the simplest and the most common monosaccharide is a six-carbon sugar calledgroup of answer choicescellulosegalactoseglucoselactose

Answers

Answer 1

The simplest and the most common monosaccharide is a six-carbon sugar called glucose.

What is glucose?

Glucose is a kind of sugar found in food, and it serves as an energy source for the body. Blood glucose or blood sugar is glucose or sugar that circulates in the blood to the body's cells. Glucose is a simple sugar that can be represented chemically as C₆H₁₂O₆. Glucose is the monosaccharide that occurs the most frequently overall, which is a subgroup of carbohydrates.

During the process of photosynthesis, plants and the majority of algae produce glucose from water and carbon dioxide by utilizing the energy from sunlight. Glucose is then used to produce cellulose in the cell walls of plants, which is the most abundant form of carbohydrate on the planet.

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Related Questions

you ordered two chemicals, calcium carbonate and sodium carbonate, but the labels fell off in transit! how could you determine, using the qualitative tests and methods you used in this lab, which chemical is which?

Answers

Calcium carbonate and sodium carbonate can be differentiated using a combination of qualitative tests and methods.

Here are a few ways to do so:

Reactivity with acid: Calcium carbonate reacts with an acid to produce carbon dioxide gas, while sodium carbonate does not.

Solubility: Calcium carbonate is poorly soluble in water, while sodium carbonate is highly soluble.

pH of aqueous solution: Calcium carbonate produces a neutral solution, while sodium carbonate produces a basic solution.

By performing these tests, you can determine which chemical is calcium carbonate and which is sodium carbonate. The test results will provide clues to the identity of the two chemicals, and a combination of results can be used to make a more confident conclusion.

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iron has a bcc crystal structure, an atomic radius of 0.124 nm, and an atomic weight of 55.85 g/mol. compute and compare its theoretical density with the experimental value found in table (7.87 g/cm3)

Answers

To calculate the theoretical density of iron with its given parameters, you can use the formula:

density = (2 atoms/unit cell)(atomic weight)/[(4π/3)(radius)³].

Using the given values of 2 atoms/unit cell, an atomic weight of 55.85 g/mol , and a radius of 0.124 nm, we can calculate the theoretical density of iron to be 7.86 g/cm3, which is very close to the experimental value of 7.87 g/cm3.

This equation can be used to calculate the theoretical density of any substance, provided the number of atoms/unit cell, atomic weight, and radius are known. Additionally, the equation can be used to compare the theoretical density of a substance to its experimental density in order to assess the accuracy of the theoretical model.

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how is the rate of reaction related to the rate of consumption of a reactant and its stoichiometric coefficient? provide your answer using a grammatically correct sentence.

Answers

The rate of reaction is directly proportional to the rate of consumption of a reactant and its stoichiometric coefficient.

The rate of reaction refers to the change in the concentration of a reactant or product over time, and it is directly proportional to the stoichiometric coefficient of the reactant. For example, if a reactant has a stoichiometric coefficient of 2 in a reaction, it will be consumed twice as fast as a reactant with a coefficient of 1. The rate of reaction can be determined by measuring the change in concentration of the reactant over time and using the stoichiometry of the reaction to calculate the rate. This relationship is crucial in understanding how reactions proceed and how to control their speed by manipulating the concentration of reactants and products.

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the hydrogen bonds among water molecules endow water with which property?

Answers

The hydrogen bonds among water molecules endow water with the property of high surface tension.

What is surface tension?

Surface tension is a property of the surface layer of a liquid that causes it to behave as if it has a thin, elastic skin. The hydrogen bonds between water molecules are relatively strong and result in the surface layer of water molecules having a higher cohesive force than the underlying liquid. This high cohesive force gives water its high surface tension, which allows it to form droplets, resist spreading out, and retain its shape.

In addition to high surface tension, the hydrogen bonds among water molecules also contribute to several other important properties of water, including its high boiling point, high heat of vaporization, and high heat capacity.

These properties make water an important solvent for many biological and chemical processes and help regulate temperature in living organisms.

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Write the balanced net ionic equation for the addition of aqueous sodium carbonate to a solution of aqueous iron(II) nitrate.

Answers

Balanced equation: Fe(NO₃)₂(aq) + Na₂CO₃(aq) ----> FeCO₃(s) + 2NaNO₃(aq) Ionic equation:  Fe²⁺(aq) + 2NO₃⁻(aq) + 2Na⁺(aq) + CO₃²⁻(aq) ----> FeCO₃(s) + 2Na⁺(aq) + 2NO₃⁻(aq).

What are Balanced equation?

An equation for a chemical reaction is said to be balanced if both the reactants and the products have the same number of atoms and total charge for each component of the reaction.

It is typical to balance chemical equations for both mass and charge in aqueous solutions. Equal numbers and types of atoms are produced on both sides of the equation when balancing for mass.

When the charge is balanced, there is no net charge on either side of the equation. Only the ions are depicted in the equation's state of matter (aq), which denotes that they are in water.

Therefore, Balanced equation: Fe(NO₃)₂(aq) + Na₂CO₃(aq) ----> FeCO₃(s) + 2NaNO₃(aq) Ionic equation:  Fe²⁺(aq) + 2NO₃⁻(aq) + 2Na⁺(aq) + CO₃²⁻(aq) ----> FeCO₃(s) + 2Na⁺(aq) + 2NO₃⁻(aq).

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PLS HELP I WILL GIVE BRAINLISTED AND I GIVE YOU SO MUCH STUFF FI NEED IT PLS

Answers

Photosynthesis removes CO2 and animal activities, burning fossil fuels and burning wood add CO2.

Why is CO2 needed?

The main greenhouse gas that helps keep our atmosphere warm is carbon dioxide. Without them, our earth would be uninhabitable. However, the rise in average global temperature due to rising levels of CO2 in our atmosphere is affecting other aspects of Earth's climate. Carbon dioxide is required for the internal respiration of the human body. Internal respiration is the process of removing carbon dioxide and delivering oxygen to body tissues.

The pH value of the blood is protected by the vital carbon dioxide. Therefore, only plants excrete CO2.

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another term for the freezing point depression constant is the: select the correct answer below: proportionality constant ebullioscopic constant cryoscopic constant none of the above

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The freezing point depression constant is another term for the cryoscopic constant. The cryoscopic constant is the change in the freezing point of a solvent per unit of solute concentration. It provides a measure of the depression of the freezing point of a solvent caused by the presence of a solute.

The cryoscopic constant is used to calculate the freezing point depression of a solution, which is the difference between the freezing point of the pure solvent and the freezing point of the solution.Freezing-point When less of one non-volatile material is added, the lowest temperature at which a substance freezes decreases, a process known as depression. Examples include mixing two solids, such as impurities into a finely powdered drug, or adding two liquids, such as alcohol or ethylene or propylene glycol to molten silver (used to make solder that flows at a lower temperature than the silver pieces being joined or in ice cream makers and for de-icing roads).

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of 12
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Coriolis Effect and Atmospheric Circulation for AP Environmental Science Student Guide
Discussion Questions
1. How does the rotation of the earth affect global
air circulation? Examine this simplified diagram of
the earth's major wind belts, and explain how the
Coriolis effect influences the direction of the polar
easterlies, the westerlies, and the trade winds.

Answers

As the Earth rotates, the circulating air is deflected. Instead of flowing straight, air deflects to the right in the Northern Hemisphere and to the left in the Southern Hemisphere, creating curved paths.

What does Coriolis effect influence?

Hurricanes, for example, spin counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere due to the Coriolis effect. The Coriolis effect deflects air from all directions as it flows toward the low-pressure area at the center of a storm.

Winds flowing from the equator to the North Pole and from the North Pole to the equator are deflected to the right by Coriolis Force, while winds flowing north-south and south-north in the southern hemisphere are deflected to the left.

Thus, The Coriolis effect refers to this deflection.

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gallium has two naturally occurring isotopes, and . if has an atomic mass of 68.926 amu, has an atomic mass of 70.925 amu, and the atomic mass of gallium is 69.723 amu, what is the percent abundance of ?

Answers

If has an atomic mass of 68.926 amu, has an atomic mass of 70.925 amu, and the atomic mass of gallium is 69.723 amu, the percent abundance of 70Ga is 101.68%.

To find the percent abundance of an isotope, you need to determine its relative abundance compared to the total amount of the isotopes present. Here's how you can do it for the isotope 70Ga:

Calculate the fraction of 70Ga in the sample:

fraction of 70Ga = (mass of 70Ga) / (atomic mass of Gallium)

fraction of 70Ga = (70.925 amu) / (69.723 amu)

fraction of 70Ga = 1.0168

Convert the fraction to a percentage:

percentage of 70Ga = (fraction of 70Ga) * 100

percentage of 70Ga = (1.0168) * 100

percentage of 70Ga = 101.68%

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when a hydrocarbon burns, water is produced as well as carbon dioxide. the density of gasoline is . assume gasoline to be represented by octane, c8h18, for which the combustion reaction is . calculate the mass of water produced from the combustion of 1.0 gallon (3.8 l) of gasoline

Answers

The balanced chemical equation for the combustion of octane (C8H18) is: C8H18 + 12.5O2 → 8CO2 + 9H2O

To calculate the mass of water produced, we first need to determine the amount of octane present in 1 gallon (3.8 L) of gasoline. The density of gasoline is around 0.7 g/mL, so 1 gallon (3.8 L) of gasoline would have a mass of approximately: 3.8 L * 0.7 g/mL = 2.66 kg = 2660 g

From the balanced chemical equation, we see that for every mole of octane burned, 9 moles of water are produced. To convert the mass of octane to the number of moles, we can use the molar mass of octane, which is approximately 114 g/mol: 2660 g / 114 g/mol = 23.4 mol

Therefore, the amount of water produced from the combustion of 1 gallon of gasoline would be: 23.4 mol * 9 moles H2O/1 mole C8H18 * 18 g H2O/mole = 3,741 g or 3.7 kg

So, approximately 3.7 kg of water would be produced from the combustion of 1 gallon (3.8 L) of gasoline.

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PLEASE HELP ME


a stream traveling at 30cm speeds up at 100cm what would be the max particle diameter it can carry

Answers

Based on the graph given, for a stream traveling at 30 cm speeds up at 100cm, the maximum particle diameter it can carry is 0.05 mm.

What is the relationship between particle size and stream velocity?

The stream velocity required to carry a particle decreases as the particle size increases.

The Channel's Size and Shape Affect the Stream Velocity

Although the shape of the stream channel also affects water flow in a stream, the gradient of the stream is the main factor.

Discharge rises as a result of the increased cross-sectional area and velocity. The competency and capacity of the stream grow with discharge and velocity.

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Help Heated Stoichemtry!!!

Answers

The volume (in liters) of ethane gas at STP burned when 5259 KJ of heat is produced is 6.7 L

How do I determine the volume (in liters) of ethane gas?

We shall begin our calculation by obtaining useful information from the balanced equation as shown below:

2C₂H₆(g) + 7O₂(g) -> 4CO₂(g) + 6H₂O(g) ΔH = -1559 KJ

From the balanced equation above,

1559 KJ of heat energy were obtained from 2 L of ethane, C₂H₆

With the above information, we shall determine the volume (in liters) of ethane, C₂H₆, needed to produce 5259 KJ of heat energy. Details below:

From the balanced equation above,

1559 KJ of heat energy were obtained from 2 L of ethane, C₂H₆

Therefore

5259 KJ of heat energy will be obtain from = (5259 × 2) / 1559 = 6.7 L of ethane, C₂H₆

Thus, the volume of ethane, C₂H₆ needed is 6.7 L

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At 395 oC, Kp = 1. 42 × 105 for the following reaction: H2 (g) + Cl2 (g) ⇌ 2 HCl (g) If 0. 021 atm of H2 and Cl2 is placed in a container. What is the equilibrium pressure for HCl? Hint: Can we assume x is small here? If not, how else can we solve it?

Answers

The equilibrium pressure of HCl is 0.175 atm.

The equation for the reaction can be written in terms of partial pressures:

P H₂ + P Cl₂ = 2P HCl

Since the initial pressures of H₂ and Cl₂ are 0.021 atm each, and x represents the change in pressure from the initial pressure, the initial pressure of HCl can be represented as 0.021 + x. The pressure of HCl at equilibrium can be represented as 2 (0.021 + x).

Calculated Kp using the following equation:

Kp = (P HCl)² / (P H₂ × P Cl₂)

Using the initial pressures and the equilibrium pressure, we can plug in the values and solve for x:

1.42 × 10⁵ = [(0.021 + x)²] / [(0.021)²]

x = 0.021 × sqrt(1.42 × 10⁵) - 0.021

x = 0.067 atm

So, the equilibrium pressure of HCl is 2 × (0.021 + 0.067) = 0.175 atm.

In this case, x is not small, so we cannot assume x is small. Instead, we solved for x using the equilibrium constant expression.

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True/False? the phenolate ion will appear this color under acidic conditions.

Answers

The given statement, "the phenolate ion will appear this color under acidic conditions" is false because phenolphthalein is itself an acid.

Generally phenolphthalein is often used as an indicator in acid–base titrations in a chemical lab. For this kind of application, phenolphthalein  turns colorless in acidic solutions and pink in basic solutions.

Basically phenolphthalein is defined as an indicator or a chemical which changes color depending on whether it mixes with an acid or a base. It often turns purple when it meets something basic, such as ammonia; and stays colorless when it meets an acid like vinegar or a neutral substance like water.

Hence, the given statement is false.

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cetic acid (hc2h3o2) is the active ingredient in vinegar. calculate the mass percent composition of oxygen in acetic acid.

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Acetic acid (hc2h3o2) is the active ingredient in vinegar. 26.67 grams   mass percent composition of oxygen in acetic acid.

Acetic acid, also known as HC2H3O2, is composed of two hydrogen atoms, two carbon atoms, and two oxygen atoms. To calculate the mass percent composition of oxygen in acetic acid, we must first find the molar mass of acetic acid. The molar mass of acetic acid is 60.052 g/mol. The molar mass of oxygen is 16.00 g/mol. Therefore, the mass percent composition of oxygen in acetic acid is 26.67%. This means that for every 100 grams of acetic acid, there are approximately 26.67 grams of oxygen atoms. the pressure of a gas is equal to the number of moles of the gas multiplied by its temperature and the universal gas constant, divided by the volume of the container.  

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when a hydroxyl group and a hydrogen atom are removed from biomolecules, water is produced and a new chemical bond is formed. what type of reaction has occurred?

Answers

Hydrocarbon chain to which hydrogens have been added. A dehydration reaction type of reaction has occurred.

A chemical reaction is a method that leads to the chemical transformation of 1 set of chemical materials to any other. Classically, chemical reactions embody changes that handiest involve the positions of electrons in the forming and breaking of chemical bonds among atoms, with no alternative to the nuclei (no alternate to the factors gift), and can often be defined by a chemical equation. Nuclear chemistry is a sub-area of chemistry that entails the chemical reactions of risky and radioactive factors where each electronic and nuclear modification can occur.

The substance (or materials) to start with concern in a chemical response are referred to as reactants or reagents. Chemical reactions are normally characterized by a chemical exchange, and they yield one or greater merchandise, which normally have houses special from the reactants. Reactions regularly consist of a series of personal sub-steps, the so-known as primary reactions, and the facts on the precise direction of movement are part of the reaction mechanism.

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How much is done when 7n of force is use to push a stalled motorbike

Answers

A push or pull on a body produces acceleration and it is called the force. Its SI unit is Newton. Here the work done when 7n of force is use to push a stalled motorbike is 35 J.

What is work done?

The amount of energy that is transferred by the applied force in moving an object is defined as the work done. The product of magnitude of the force applied and the distance moved by the object in the direction of the force is the formula of work done.

W = F × d

Here F = Force,  d = distance moved in meter (m).

The SI unit of the work done is joule (J).

The given force is 7N and the distance moved by the object is 5m. Then the work done is:

W = 7 × 5 = 35 J

Thus the amount of work done is 35 J.

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Your question is incomplete but most probably your full question was,

How much work is done when 7 N of force is used to push a stalled motorbike 5 m?

How does the product of an alpha decay compare with the original nuclide?

A.
The product's mass number is the same as that of the original nuclide.
B.
The product's atomic number is two less than that of the original nuclide.
C.
The product's mass number is two more than that of the original nuclide.
D.
The product's atomic number is the same as that of the original nuclide.

Answers

When compared to the initial nuclide, the alpha decay product: The answer is B. The atomic number of the product is two less than the atomic number of the original nuclide.

What is Alpha Decay?

A nuclear process known as "alpha decay" causes the parent nucleus to emit an alpha particle. The alpha particle is made up of two neutrons and two protons. There is a radioactive decay process known as "alpha decay" in which an atomic nucleus produces an alpha particle and radioactively decays into a separate atomic nucleus with a mass number reduced by four and an atomic number reduced by two.

Alpha decay reduces atomic mass by 4 and atomic number by 2.

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How can you best take advantage of Catholic Schools Week

Answers

The best way to take advantage of Catholic Schools Week is to volunteer and get involved in community events.

What is the Catholic Schools Week ?

Catholic Schools Week is an annual celebration of Catholic education, typically held in the United States during the last week of January. To take advantage of this week, you can participate in the events and activities organized by your local Catholic school or parish.

Volunteer at your local Catholic school to help with events, projects, or activities. You can also offer to mentor students or assist teachers. Catholic Schools Week often includes events like open houses, talent shows, and sports games.

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lithium belongs to the group of the periodic table. question 7 options: a) alkaline earth metal b) alkali metal c) noble gas d) halogen

Answers

Lithium belongs to the group of the periodic table, specifically Group 1. Group 1 elements are commonly referred to as the "alkali metals".

Lithium is a chemical element with the symbol Li and atomic number 3. It is a soft, silvery-white metal and is the lightest of all metals. Lithium belongs to the Group 1 of the periodic table, which is commonly referred to as the "alkali metals". Alkali metals are characterized by their low reactivity and high reactivity with water. They are also highly reactive with halogens and form ionic compounds, such as lithium chloride, with non-metals. Lithium is an important element in the production of batteries, ceramics, and pharmaceuticals. In addition, it is used as a treatment for bipolar disorder and other mental health conditions. Lithium is found in nature in minerals such as spodumene, lepidolite, and petalite, and it is also present in seawater.

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quizzlet consider a component made of joined copper and iron pieces that will be exposed to salt water conditions as pictured here (top image labels what is what). which placement(s) of a plastic coating (a, b, c, or d below) could be used to prevent galvanic corrosion?

Answers

The placement of a plastic coating (a, b, c, or d below) that could be used to prevent galvanic corrosion would depend on the type of plastic coating being used and the specifics of the joined copper and iron pieces that are exposed to salt water conditions.

Generally, a plastic coating should be applied to prevent any direct contact between the copper and iron pieces. Placement “a” and “b” could both be used, as they would create a barrier between the two pieces, while placement “c” and “d” would not be as effective because there would still be direct contact between the two pieces.

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When a forensic scientist uses specific antigens and serum antibody he/she is performing

Antigens
Antibody
Cast-off pattern
Serology
Drip pattern
Swipe pattern
Flow pattern
Type A blood
Type B blood
Type O blood

A bloodstain pattern created when blood is released or thrown from a moving blood-bearing object is called:

Arterial spurting pattern
Cast-off pattern
Drip pattern
Impact pattern

Why do mothers have to be aware of the Rh factor?

If the mother is Rh positive and her child is Rh negative she will form antibodies that may kill her second child (if they are also Rh negative) because of agglutination between the antibodies of the mother and the blood of the baby.

If the mother is Rh positive and her child is Rh negative she will form antibodies that may kill her first child because of agglutination between the antibodies of the mother and the blood of the baby.

If the mother is Rh negative and her child is Rh positive she will form antibodies that may kill her second child (if they are also Rh positive) because of agglutination between the antibodies of the mother and the blood of the baby.

If the mother is Rh negative and her child is Rh positive she will form antibodies that may kill her first child (if they are also Rh positive) because of agglutination between the antibodies of the mother and the blood of the baby.

Answers

1) He is performing serology

2) Cast-off pattern

3) If the mother is Rh negative and her child is Rh positive she will form antibodies that may kill her second child

What is serology?

Serology is the scientific study of blood serum and other bodily fluids to detect the presence of specific antibodies or antigens.

This is usually done through a laboratory test called a serological assay, which is used to diagnose various infectious diseases, autoimmune disorders, and other medical conditions.

Serological tests work by detecting the presence of antibodies in a patient's blood serum or other bodily fluids.

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A pH strip was used to test the pH of a glass of water. The image shows the results.



Use the scale below to determine the pH value of the water, and determine whether the water is acidic, alkaline, or
neutral. Then predict what will happen to the pH if someone were to place a straw into the water and blow.

Answers

The pH strip is used to test the pH of a solution. The pH of water is neutral which is around 7.

What is pH?

The pH is known as the power of hydrogen. The pH is used to measure the  degree of basicity and acidity of a solution. The amount of hydrogen ion concentration in a solution determines the pH of the solution.  Mathematically, pH is given by the formula:

pH -= -log [H⁺]

The pH strip is a strip of litmus paper with which a person can measure the pH value of a liquid solution. The substance in the pH paper causes the paper to show a different color at different acidity values. The official pH scale is between the pH values of 0 to 14, where 0 is very acidic and 14 very alkaline and 7 is neutral pH.

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Answer:

The pH value of the water is 7. And I don't exactly know what would happen if you put a straw into it and blew into it, but if I had to make a guess then I would guess that the pH value would go down because the water is moving around.

Calculate the specific heat capacity for a 32.3-g sample of titanium that absorbs 392 j when its temperature increases from 42.1 °c to 65.3 °c.

Answers

The specific heat for the given sample will be 0.522 J/g°C

Q= mcΔT,

here Q is the heat energy absorbed,

m is the mass of the sample,

ΔT is the change in temperature.

Q= m*c*ΔT,

Q= m*c*(T2-T1)

since we have to find the specific heat capacity therefore,

c= Q*(T2-T1)/m

putting values,

c= 392/(65.3-42.1)*32.3

c= 392/23.2*32.3

c= 392/749.36

c=0.522 J/g°C

The specific heat capacity is the amount of heat absorbed by a unit mass of a material when it's temperature is increased by 1°C.

The S.I unit for Specific heat capacity is Joule per kelvin per kilogram.

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when 2.00g of magnesium combines with oxygen, the resulting mass of magnesium oxide is 3.32g. what was the mass of oxygen that combined with the magnesium?

Answers

1.32 g of oxygen combined with 2.00 g of magnesium to form 3.32 g of magnesium oxide.

What is a balanced equation?

A chemical equation is said to be balanced when each element has an equal number of atoms on both the reactant and product sides of the equation. In other words, the equation depicts a chemical reaction in which the total number of atoms present prior to the reaction is equal to the total number present following the reaction.

The law of conservation of mass is upheld when the equation is balanced, and the reaction that is occurring is correctly depicted.

You must find the difference between the total mass of the reactants and the mass of the product in order to calculate the mass of oxygen that combined with magnesium. The chemical equation for the reaction of magnesium and oxygen is as follows:

O2 + 2Mg = 2MgO

Therefore, the mass of magnesium oxide (MgO) produced by the reaction of 2.00 g of magnesium (Mg) and a small amount of oxygen (O) can be expressed as follows:

x g O + 2.00 g Mg = 3.32 g MgO

where x represents the oxygen's mass. You can calculate x by deducting the mass of magnesium from the product's overall mass:

We get 1.32 g from x = 3.32 g - 2.00 g.

Therefore, 1.32 g of oxygen and 2.00 g of magnesium were combined.

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What quantity in moles of
precipitate will be formed when
70.0 mL of 0.150 M AgNO3 is
reacted with excess CaCl₂ in the
following chemical reaction?
2 AgNO3(aq) +CaCl₂(aq) → 2
AgCl(s) + Ca(NO3)2(aq)

Answers

Answer: 0.0105 mol AgCl

Explanation:

Step 1: To find moles AgNO₃, use 70.0 mL and 0.150 M and the definition of molarity. Convert 70.0 mL to L.

70.0 mL x (1 L/1000 mL) = 0.070 L

M = mol/L

0.150 = mol/0.070

0.150 x 0.070 = mol

0.0105 mol AgNO₃

Step 2: Use the balanced equation and the moles AgNO₃ from step 1 to determine moles precipitate (AgCl) when reacting with excess CaCl₂.

0.0105 mol AgNO₃ x (2 mol AgCl/2 mol AgNO₃) = 0.0105 mol AgCl

0.0105 mole of precipitate will be formed when 70.0 mL of 0.150 M AgNO[tex]_3[/tex] is reacted with excess CaCl₂ in the given chemical reaction.

What is mole?

In chemistry, a mole, usually spelt mol, is a common scientific measurement unit for significant amounts of very small objects like atoms, molecules, or even other predetermined particles. The mole designates 6.02214076 1023 units, which is a very large number. Under the International Units of Measurement (SI), the mole is defined as this number as of May 20, 2019, according the General Meeting on Weights and Measurements.

The quantity of atoms discovered through experimentation to be present in 12 grammes of carbon-12 was originally used to define the mole. On honour of a Italian scientist Amedeo Avogadro, the amount of cells in a mole is also known as Avogadro's number or Avogadro's constant (1776–1856).

70.0 mL x (1 L/1000 mL) = 0.070 L

M = mol/L

0.150 = mol/0.070

0.150 x 0.070 = mol

0.0105 mol AgNO₃

0.0105 mol AgNO₃ x (2 mol AgCl/2 mol AgNO₃) = 0.0105 mol AgCl

Therefore, 0.0105 mole of precipitate will be formed when 70.0 mL of 0.150 M AgNO3 is reacted with excess CaCl₂ in the given chemical reaction.

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the half-life of radium-226 is 1590 years. if a sample contains 500 mg, how many mg will remain after 1000 years?

Answers

The remaining amount after 1000 years is 323.33 mg.

What is radioactivity decay?

An atom's nuclei exhibit radioactivity as a result of nuclear instability. Henry Becquerel made this discovery in 1896. The process of radioactivity is when an unstable atom's nucleus releases radiation to lose energy. In a drawer containing photographic plates, a small quantity of uranium compound was placed after being wrapped in black paper. When these plates were later examined, the findings showed that an exposure had occurred. The phrase "radioactive decay" is used to describe this occurrence. Radioactive elements are those elements or isotopes that emit radiation and undergo radioactivity.

The formula of half-life is

[tex]t_{\frac{1}{2}[/tex] = ln 2/λ

Given that the half-life of radium-226 is 1590 years.

λ = ln 2/ 1590

The formula of radioactivity decay is

N = N₀e^(-λt)

N = final amount

N₀ = initial amount

t = time

Given that

The initial amount is N₀ = 500 mg, λ = ln 2/ 1590, and t = 1000 years

N =  500 e^(- (ln 2/ 1590) ×1000)

N = 323.327737322

N = 323.33

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in one process, 135 g of al are reacted with 601 g of fe2o3. calculate the mass (in grams) of al2o3 formed, and determine the amount of excess reagent left at the end of the reaction.

Answers

135 g of al are reacted with 601 g of fe2o3. 254.9 grams of al2o3 formed, and  there is 202.5 g of excess Fe2O3 left at the end of the reaction.

The balanced chemical equation(Fe2O3) is:

2Al + Fe2O3 → Al2O3 + 2Fe

moles of Al = 135 g / 26.98 g/mol = 5.00 mol

moles of Fe2O3 = 601 g / 159.69 g/mol = 3.77 mol

The mass of Al2O3 produced can be calculated as follows:

moles of Al2O3 = moles of Al / 2 (from balanced equation)

moles of Al2O3 = 5.00 mol / 2 = 2.50 mol

mass of Al2O3 = moles of Al2O3 x molar mass of Al2O3

mass of Al2O3 = 2.50 mol x 101.96 g/mol = 254.9 g

Therefore, 254.9 g of Al2O3 is formed in the reaction.

mass of excess Fe2O3 = moles of excess Fe2O3 x molar mass of Fe2O3

mass of excess Fe2O3 = 1.27 mol x 159.69 g/mol = 202.5 g

Therefore, there is 202.5 g of excess Fe2O3 left at the end of the reaction.

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Explain the difference in Kinetic energy between the polar molecules at 100k to the non polar molecules at 100 k. Which group of molecules has the greater intermolecular forces between them
Answer using complete sentences

Answers

Answer:

Explanation:

The kinetic energy of molecules is related to their temperature, and at a given temperature, all molecules, polar or non-polar, have the same average kinetic energy. The difference between polar and non-polar molecules lies in their intermolecular forces. Polar molecules have dipoles (separation of charge) due to differences in electronegativity of the atoms within the molecule. These dipoles cause the polar molecules to have stronger intermolecular forces, such as dipole-dipole forces and hydrogen bonding, compared to non-polar molecules which only have weak van der Waals forces.

At 100 K, the kinetic energy of both polar and non-polar molecules is low. However, polar molecules are more likely to be attracted to each other due to their stronger intermolecular forces. This means that polar molecules may have lower kinetic energy compared to non-polar molecules at the same temperature, because they may be more likely to be held together by these forces.

In terms of which group of molecules has greater intermolecular forces, it would be the polar molecules due to the presence of dipoles and the resulting stronger intermolecular forces. However, it's important to note that intermolecular forces can vary greatly within each group of molecules, depending on the specific molecule and its structure.

Explain why there would be no reaction between Potassium Chloride and Zinc

Answers

Zinc and potassium chloride wouldn't react with each other. There is no reaction because potassium has a higher degree of reactivity than zinc.

Potassium cannot be removed from a compound by zinc. Since zinc is replacing potassium, it must have a greater activity level. It is, however, lower, therefore there is no interaction between these two molecules.

When potassium hydroxide and zinc metal combine, potassium zincate is created as well as hydrogen gas.

Nitric acid being a potent oxidizing agent prevents zinc from reacting with it. It reduces itself to an oxide while oxidizing the hydrogen gas produced by the interaction of zinc with nitric acid to make water.

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There would be no reaction between Potassium Chloride and Zinc as zinc is less reactive than potassium.

What is zinc?

Zinc has the chemical symbol Zn and the atomic number 30. At room temperature, zinc is a somewhat brittle metal with a shiny-greyish look when oxidation is eliminated. It is the first element in periodic table group 12 (IIB).

Zinc is the twenty-fourth most prevalent metal in the Earth's crust, with five stable isotopes. Sphalerite (zinc blende), the zinc sulfide mineral, is the most common zinc ore. There would be no reaction between Potassium Chloride and Zinc as zinc is less reactive than potassium.

Therefore, there would be no reaction between Potassium Chloride and Zinc as zinc is less reactive than potassium.

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