According to question the pressure of the gas is 4.45 atm.
Pressure is a physical force exerted on a surface by an object or a liquid. It is measured in units of force per unit area, such as pounds per square inch (psi) or pascals (Pa). Pressure is created when a force is applied to an object, causing it to compress or expand.
The pressure of the gas can be calculated using the ideal gas law, which states that PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.
To calculate the pressure, we first need to calculate the number of moles of CO₂ gas in the container. We can do this by using the molar mass of CO₂, which is 44.01 g/mol.
n = (78.1 g CO₂) / (44.01 g/mol) = 1.77 mol
Now that we have the number of moles, we can calculate the pressure using the ideal gas law.
P = (1.77 mol)(0.0821 L·atm/K·mol)(273 K) / (48.0 L)
P = 4.45 atm
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What part of the small intestine is the most important for nutrient absorption and what else occurs at this location what makes the small intestine unique?
Part of the small intestine is the most important for nutrient absorption is the jejunum and what else occurs at this location what makes the small intestine unique is it contains villi which increase the surface area to aid absorption.
The small intestine is part of the digestive tract which consists of villi, circular muscles, longitudinal muscles, mucous lining, and epithelium. In the small intestine, a chemical digestion process occurs where enzymes break down complex organic matter molecules into simpler molecules which are then absorbed by the epithelial cells.
Jejunum is part of the small intestine which is red in color because it contains lots of blood vessels and is located between the duodenum and ileum. Jejunum is the most important part of the small intestine because it absorbs most of the nutrients from food and water so that it can be used by the body. In the jejunum there are folds or projections called villi. Villi function to expand the surface of the small intestine which helps the absorption process.
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Arrange the liquids ethanol (C2H5OH), glycerol [HOCH2CH(OH)CH2OH], and ethylene glycol (CH2OH)2 in decreasing order of expected viscosities.
The decreasing order of viscosity of the given liquids is as glycerol, ethylene glycol, and ethanol.
Viscosity is the resistance of a fluid to change shape or flow when compared to other liquids. So the fluid with high viscosity will have low fluidity. The main reason for increased viscosity will be due to the molecular interactions . Viscosity can also be defined as the ease with which the molecules can move concerning one another. That means the more the interaction between molecules, the more viscosity.
In the case of the given liquids, all have OH groups, which could result in hydrogen bonding. So more the hydroxyl groups, the more the hydrogen bonding, the more interaction, and high the viscosity. Here glycerol has three OH groups, So it will have the highest viscosity. The ethylene glycol with two OH groups comes second and then ethanol.
So the decreasing order of viscosity will be, Glycerol, Ethylene glycol, and Ethanol.
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Hannah is trying to figure out how tooth size is determined in two different wolves. In wolf 1, the copies of the gene are different from each other. In wolf 2, the copies of the gene are the same as each other. How does this affect how many types of proteins there are in each tooth cell?
A) Wolf 1 has one type of protein for the tooth size feature. Wolf 2 has one type of protein for the tooth size feature.
B) Wolf 1 has two types of protein for the tooth size feature. Wolf 2 has one type of protein for the tooth size feature.
C) Wolf 1 has two types of protein for the tooth size feature. Wolf 2 has two types of protein for the tooth size feature.
D) It is impossible to say anything about proteins from the given information.
The way the copies of the gene in the wolves affects the number of types of proteins in each tooth cell is B) Wolf 1 has two types of protein for the tooth size feature. Wolf 2 has one type of protein for the tooth size feature.
How does genes affect protein ?The gene that determines tooth size in wolves is located on a specific chromosome, each individual has two copies of that chromosome, one inherited from each parent.
If the copies of the gene in Wolf 1 are different from each other, it means that the wolf is heterozygous for that gene, meaning it has two different versions of the gene, one inherited from each parent. This leads to the production of two different types of proteins in each tooth cell, and thus a variation of tooth size in Wolf 1.
If the copies of the gene in Wolf 2 are the same as each other, it means that the wolf is homozygous for that gene, meaning it has two identical copies of the gene inherited from the same parent.
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The boiling point of a liquid is the temperature at which the vapor pressure of the liquid is equal to the pressure on the surface of the liquid. The heat of vaporization of ethanol is 838 joules per gram.
A sample of ethanol has a mass of 65.0 grams and is boiling at 1.00 atmosphere. Calculate the minimum amount of heat required to completely vaporize this sample of ethanol.
The heat required to vaporize the ethanol is 54.47 kJ.
What heat is required to vaporize the ethanol?We know that the heat of vaporization would have to do with the heat that is required so as to be able to change the state of the object. It is the heat that is required so as to enable the phase to be changed from liquid to gas phase.
H = mL
H = heat required
L=Heat of vaporization
m = mass of the liquid
H = 65 g * 838 joules per gram
H = 54.47 kJ
The ethanol would be vaporized by 54.47 kJ. This is the heat that is required to vaporize ethanol from the calculation above.
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In an experiment involving a balloon, a scientist notices that the gas particles within the balloon begin to move faster, resulting
in the balloon expanding. Which statement best describes the experiment? (1 point)
O The scientist is investigating Boyle's law, which shows that pressure and volume are directly proportional.
O The scientist is investigating Charles's law, which shows that temperature and volume are directly proportional.
O The scientist is investigating Boyle's law, which shows that pressure and volume are inversely proportional.
O The scientist is investigating Charles's law, which shows that temperature and volume are inversely proportional.
The statement which describes the experiment best is,the scientist is investigating Charles's law, which shows that temperature and volume are directly proportional.
What is Charles's law?
It states that the volume of a given mass of gas is directly proportional to its absolute temperature when pressure is held constant. It states that the volume of a given mass of gas is directly proportional to its absolute temperature when pressure is held constant. In other words, if the temperature of a gas increases, its volume will also increase. This relationship was first described by French scientist Jacques Charles in 1787. He based his law on the results of experiments he conducted with varying amounts of gas. Charles's Law is one of the gas laws, which were used to formulate the ideal gas law. This law is especially useful for understanding how gases behave under various conditions, such as changes in temperature and pressure. It is also important to note that Charles's Law does not apply to liquids and solids as they are not gases.
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In a 100.0 g a sample of a compound containing only copper and sulfur There are found to be 79.9 Of copper and 20.1 g of sulfur
A sample of a compound made up exclusively of copper and sulphur weighing 100.0 g was discovered to contain 79.9 g of copper, 20.1 g of sulphur, and 20.01 g of M(s).
What do you mean compound?In chemistry, a compound is a substance made up of two or more different chemical elements that have been combined together in a specific ratio. When the elements interact with one another, difficult-to-break chemical bonds are formed. a substance produced chemically by combining two or more different elements. Examples of compounds are table salt (NaCl), which is generated from the elements sodium and chloride, and water (H2O), which is created from the components hydrogen and oxygen.
What is not a compound?A compound is a chemical entity made up of numerous identical molecules bound together by chemical bonds and made up of atoms from different elements. A molecule is not regarded as a compound if it solely contains atoms from one element.
m = mcompound * W
m(Cu) = 100 g * 0.799 = 79.0* g
M(S) = 100 g * 0.201 = 20.01 g.
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According to the bohr model of the atom, the single electron of a hydrogen atom circles the nucleus...
a. in specific, allowed orbits.
b. in one fixed orbit at all times.
c. at any of an infinite number of distances, depending on its energy.
d. counterclockwise.
The protons and neutrons that make up the atom's nucleus account for the majority of the atom's mass according to the Bohr model.
What is meant by bohr model of the atom?The Bohr model, also known as the Rutherford-Bohr model, was first proposed by Niels Bohr and Ernest Rutherford in 1913. It is a system made up of an orbiting nucleus that is compact and dense, surrounded by electrons, much like the Solar System.
Bohr was the first to realise that electrons move in various orbits around the nucleus and that the quantity of electrons in an element's outer orbit determines its properties.
In the Bohr model of the atom, the protons and neutrons that make up the nucleus are responsible for most of the atom's mass. The negatively charged electrons orbit the positively charged core, making up a small portion of the mass but being electrically comparable to the protons in the nucleus.
Therefore, the correct answer is option a. in specific, allowed orbits.
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Draw the structure of acetylsalicylic acid. Circle the ester group. List two things which might be done in order to help facilitate the recrystallization of acetylsalicylic acid. What did your ferric chloride test indicate? List several common inert ingredients of aspirin.
Acetylsalicylic acid (ASA) is commonly known as Aspirin. Its structure contains a benzene ring on the left side and two functional groups, carboxylic acid and ester group linked to it.
The molecular formula of acetylsalicylic acid is C₉H₈O₄ and the expanded formula is CH₃COOC₆H₄COOH.
The crude aspirin should be dissolved in a small amount of warm ethanol to aid in the recrystallization of acetylsalicylic acid. Water will then be added, and the solution will be gradually cooled and chilled. The ASA will recrystallize, leaving the solid impurities dissolved in the solution.
The ferric chloride test detects the presence of phenol. The formation of purple color indicates a positive test result.
Several common inert ingredients of aspirin are:
Colloidal silicon dioxideCornstarchCroscarmellose sodiumHypromelloseIron oxide red Microcrystalline cellulosePolyethylene glycolPolysorbate 80Stearic acid Titanium dioxideLearn more about recrystallization here
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A solid whose molecules are arranged in a repeating pattern, is called?
Answer:
Crystalline solids
Explanation:
hope this helps
Consider these chemical equations. n2(g) + 3h2(g) → 2nh3(g) c(s) + 2h2(g) → ch4(g) 4h2(g) + 2c(s) + n2(g) → 2hcn(g) + 3h2(g) which equation(s) do you need to reverse in order to calculate the overall equation for the formation of hcn and h2 from nh3 and ch4? check all that apply. a. n2(g) + 3h2(g) right arrow 2nh3(g) b. c(s) + 2h2(g) right arrow ch4(g)c. 4h2(g) + 2c(s) n2(g) right arrow 2hcn(g) + 3h2(g)
Equation 2, i.e. C+ 2H2= CH4, and equation 1 i.e.N2+3H2=2NH3 have to be reversed to obtain the overall equation. Thus, options A and B are correct.
According to chemical symbolization, the definition of a chemical equation is a reaction that results in the formation of products. The creation of the consequent reaction has been caused by the inclusion of several steps in the appropriate order.
chemical formulas
The picture that is attached has the given chemical formulae.
The graphic that is included provides the anticipated final response.
Methane and ammonia served as the reactant in the subsequent reaction, which produced carbon and hydrogen.
Methane has been on the product side of equation 2 and ammonia has been on the product side of equation 1.
Thus, equation 2, i.e. C+ 2H2= CH4, and equation 1 i.e.N2+3H2=2NH3 have to be reversed to obtain the overall equation. Thus, options A and B are correct.
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Answer:
A and B, A, C
Explanation:
What mass of HBO2 is produced from the
combustion of 53.2 g of B2H6?
The total mass of products produced from the combustion of 53.2 g of B2H6 is 105.63 g.
What is combustion?Combustion is a chemical reaction that involves the oxidation of a fuel that produces heat and light. During combustion, oxygen combines with the fuel to form new compounds, such as water vapor, carbon dioxide, and other gaseous products.
The combustion of B2H6 produces two moles of H2O and one mole of B2O3. The mass of H2O produced can be calculated by multiplying the moles of H2O by the molar mass of H2O, which is 18.015 g/mol. The mass of B2O3 produced can be calculated by multiplying the moles of B2O3 by the molar mass of B2O3, which is 69.6 g/mol.
Therefore, the mass of H2O produced from the combustion of 53.2 g of B2H6 is 2 x 18.015 g/mol = 36.03 g. The mass of B2O3 produced from the combustion of 53.2 g of B2H6 is 1 x 69.6 g/mol = 69.6 g.
The total mass of products produced from the combustion of 53.2 g of B2H6 is 36.03 g + 69.6 g = 105.63 g.
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Draw all resonance structures for methylisocyanate, CH3NCO, a toxic gas used in the manufacturing of pesticides. Which resonance structures are the most important?
The methyl isocyanate, CH₃NCO is the toxic gas used for the manufacturing of the pesticides. All the three resonance structure are attached below.
The methyl isocyanate is the organic compound, which is a colorless. It is used in the manufacturing of the pesticides. The methyl carbon is sp³ hybridized. the nitrogen atom is sp² and the isocyanate carbon is sp hybridize and the oxygen atom is sp² hybridized.
The most important resonance structure for the metyl isocyanate is given below:
H
| .. ..
H - C - N = C = O :
|
H
The methyl isocyanate is vey toxic for humans from the acute exposure.
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[See picture]
1.) Which solution is considered SATURATED at 50C (Celsius) when 50g of solute is able to dissolve in 100g of water?
2.) At 40C (Celsius), 40g of KNO3 are mixed. The solution would be considered saturated, supersaturated, or unsaturated?
Ammonium chloride is soluble in water at a rate of around 50 g per 100 g at 50 °C. Potassium nitrate is exceptionally soluble in water.so the solution is Unsaturated.
What are Saturated and Unsaturated Solutions?A saturated solution is one that has as much of the solute present as is capable of dissolving.
A solution is said to be unsaturated if it doesn't contain all of the solute that can dissolve in it.
NaCl, or table salt, easily dissolves in water. Imagine you have a beaker of water, and you add some salt while swirling to make sure it dissolves. More is added, and it dissolves. No matter how long or how vigorously you swirl it, the salt ultimately reaches a point where it will not dissolve any further. Why? We are aware, at the molecular level, that the water's action causes the individual ions to separate from the salt crystal and enter the solution, where they are kept hydrated by water molecules. Additionally, some of the dissolved ions crash with the crystal once more and stay there. Recrystallization is the process by which a dissolved solute transforms back into a solid.
The rate of recrystallization of the dissolved solute equals the rate at which the solid salt is dissolving at given location. The overall amount of dissolved salt remains constant after that stage is achieved. The physical state characterized by the opposing processes of dissolving and recrystallization is known as solution equilibrium.
The solubility of KNO3 at 40 degree Celsius
Ammonium chloride is soluble in water at a rate of around 50 g per 100 g at 50 °C. This indicates that a saturated solution will only develop at 50 degrees Celsius when 50 grams of ammonium chloride are dissolved in 100 grams of water.
Potassium nitrate is exceptionally soluble in water.so the solution is UNSATURATED .It states that the maximum of potassium nitrate 65 g is soluble at 40°C in 100 g of water.
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Consider the transport of glucose into an erythrocyte by facilitated diffusion. When the glucose concentrations are 5mM on the outside and 0.1 mM on the inside, the free-energy change for glucose uptake into the cell is: (These values may be of use to you: R= 8.315 J/mol middot K; T=298 K; 9 (Faraday constant)=96, 480 J/V; N=6.022 times 10^23/mol.)
The transport of glucose into erythrocyte by facilitated diffusion. When the glucose concentrations are 5mM on the outside and 0.1 mM on the inside, the free-energy change for glucose uptake into the cell is about 10 kJ/mol.
Given that :
Concentration of the outside = 5 mM
Concentration of the inside = 0.1 mM
Gas constant , R = 8.315 J/mol
Temperature T = 298 K
Faraday constant = 96480 J/V
N = 6.022 × 10²³ /mol
ΔV = 0.06 V
The free energy change is given as :
ΔG = RT ln (C in / C out) + ZFΔV
By using all the values , we get"
ΔG = 10 kJ/mol
Thus, the free energy change is 10 kJ/mol.
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PLEASE HELPPPP!!
Lab Report
Motion and Forces
Introduction-
1. What was the purpose of the experiment?
2. What were the independent, dependent, and control variables in your investigation? Describe the variables for each part of the experiment.
3. Write a hypothesis based on observations and scientific principles.
Experimental Methods-
4. What tools did you use to collect your data?
5. Write your procedure. List each step so that another student could follow the procedure and repeat your experiment.
Data and Observations-
6. Record your observations.
Conclusions-
7. What conclusions can you draw about how the sum of forces acting on an object affect its motion? Write an evidence-based claim.
8. Which mass, A, B, or C, was the greatest? Use the observations from your experiment and your knowledge of Newton’s laws of motion to write an evidence-based claim.
9. Make a model that shows the forces acting on two blocks on a flat, frictionless surface:
A 1 N block at rest
A 1 N block with 2 N of force applied in one horizontal direction
Include arrows to represent the forces and labels to indicate the magnitude of each force. Use your model to compare and explain the motion of each block.
Answer:
The purpose of this experiment was to see how motion takes place as well as Force The independent was the second item used I think that what happened at the thing I used I took a ball and threw it on the ground from height distance I recorded the time Same height
How many grams does 8.92 x 1024 atoms of tin weigh?
I apologize, I made an error in my previous response. 8.92 x 1024 atoms of tin would actually weigh approximately 5.26 x 10^25 grams.
To calculate this, you can use the formula:
Weight (in grams) = Number of atoms x Atomic weight (in grams/mol)
The atomic weight of tin is 118.710 g/mol. So,
Weight (in grams) = 8.92 x 1024 atoms x 118.710 g/mol
Weight (in grams) = 1.05 x 10^26 g
Weight (in grams) ≈ 5.26 x 10^25 g
Keep in mind that this is an extremely large weight and not practically measurable as it's equivalent to 5.26 x 10^25 tons.
a log is added to a camp fire and is bured. this is an example of a change.
Answer:
Chemical Change
Explanation:
A log is added to a camp fire and is burned. This is an example of a chemical change.
Based on the reading, what are the properties of carbon-14? Check all that apply.
Carbon-14 is a naturally occurring carbon isotope.
Carbon-14 has a known half-life.
Carbon-14 decays completely within 1,000 years.
Carbon-14 is not radioactive.
Carbon-14 is present in all living organisms.
To solve this we must be knowing each and every concept related to isotope. Therefore, the correct options are options A among all the given options.
What is isotope?Every atom has an equal amount of protons and electrons, however isotopes are a little slightly weird because they contain variable quantities of neutrons while having an equal number of protons and electrons. Isotopes, however, differ in atomic mass while sharing the very same atomic number or place in the periodic table.
It is a naturally occurring (one parts per trillion) isotope.
It is radioactive, It has a half- life of 5,700 years.
It is found in all living organisms hence used for Carbon dating.
Therefore, the correct options are options A among all the given options.
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A small coil of magnesium ribbon is placed in a crucible. The crucible and cover have a mass of 21.35 grams. Measuring the mass, including the magnesium gives 21.63 grams. The crucible, cove and contents are heated and then cooled and treated with water, A second heating and measuring of the final product (magnesium combined with oxygen) gives a mass of 21.82 grams. Determine the empirical formula of this oxide of magnesium.
The empirical formula of this oxide of magnesium is derived as MgO.
What is empirical formula?In chemistry, empirical formula of a chemical compound is simplest whole number ratio of atoms present in compound. An example of this concept is that: empirical formula of sulfur monoxide, or SO, would be SO as the empirical formula of disulfuric dioxide, S₂O₂.
Given total mass of magnesium ribbon, crucible and cover of 21.35 grams
Given that magnesium combined with oxygen gives a mass of 21.82 grams.
As we know, mass of magnesium oxide = mass of Mg + mass of O
mass of O = 21.82 - 21.35
= 0.19
moles of O = 0.19/16
= 0.011 mol O
So, now the empirical formula of magnesium oxide is MgO.
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If a bond cleave next to the heteroatoms such as oxygen, sulfur and nitrogen generates a resonance stabilized cation. For instance, breaking the bond among carbon after alcohol radical generates a carbocation which is stabilized by resonance. This is named alpha cleavage and it is usually found in alcohols.
The Alpha cleavage of the alcohols is when a bond will cleave next to the heteroatoms to generates the resonance stabilization of the cation. This cleavage generally found in the alcohols.
The bond cleavage next to the heteroatoms like as oxygen, sulfur and the nitrogen will generates the cations that is resonance stabilize. The cleavage of bond in between the carbon and the carbon that is next to atom generated the cation and it is resonance stabilized. This Alpha bond cleavage is generally found in the alcohols.
Thus, the alpha bond cleavage is breaking of the carbon - carbon bond that is adjacent to carbon attached to the functional group.
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I need a description of the rocks and the unknown fossil.
Table E. Arrangement of Rocks in Geologic Time Scale and Identity of Unknown Fossil
The earliest rocks are Cambrian, followed by Ordovician, Devonian, and Permian rocks.
What are rocks?A rock is a naturally occurring substance made up of crystalline crystals consisting of various minerals that have fused together to form a solid mass.
It's possible or unlikely that the minerals that make up rock's composition developed at the same time.
On the earth's surface, igneous rocks—which are volcanic rocks—are widespread. They are created when molten material solidifies.
One of these is granite, which is created when magma solidifies underground.
Sedimentary rocks are those that are created from the eroded pieces of other rocks. Even the carcasses of plants or animals are used to create them.
Thus, the oldest rocks are therefore those that are Cambrian, followed by Ordovician, Devonian, and Permian in age.
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Arrange the following compounds in order of decreasing boiling point. Rank from largest to smallest.
Sort the items in ascending size. Alcohol (primary>secondary>tertiary) > Amines (primary>secondary>tertiary) compounds with a lower boiling point are ALKANES in that order.
What exactly is indeed a compound element?A compound in chemistry is a substance composed of two or more separate chemical elements mixed together in a certain proportion. When the elements are combined, they react with one another and create chemical connections that are challenging to dissolve. These bonds are formed as a result as atoms sharing or trading electrons.
How are compounds made?Whenever a group of atoms unite to form a pure material, compounds are created. These can be reduced to their component atoms. The atoms of a reactants interact during chemical reactions to create new compounds. Reacting species are known as reactants, while the results of the reaction are known as products.
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The correct question is
List the following compounds in order of decreasing boiling point: Rank from largest to smallest. To rank items as equivalent, overlap them.
What is the molar mass of AI(CIO4)3?
Answer:
Molar mass is 325.33
Explanation:
Molar mass is 325.33
Convert 8.3 X 1022 molecules of carbon dioxide gas to grams.
22 is an EXPONENT Above
Answer:
Read below
Explanation:
Do a quick conversion: 1 mole CO2 = 44.0095 gram using the molecular weight calculator and the molar mass of CO2. Check the chart for more details.
Complete the chart. (Remember to enter a "0" if necessary.)
Atomic Number: 3
The electronic configuration of atomic number 3 will be, 1s²: 2s^1 with all the other slots filled in as 0.
What is electronic configuration?The electron configuration is described as the distribution of electrons of an atom or molecule in atomic or molecular orbitals.
As we are given that the atomic number of an element is, 3. Now we have to determine the electronic configuration of an element that has the atomic number 3.
We know that the atomic number is equal to the number of protons or number of electrons.
So, the number of electrons the element has is equal to 3.
Therefore, the electronic configuration of atomic number 3 will be, 1s²: 2s^1 .
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Complete question:
Complete the chart. (Remember to enter a 0 if necessary.) Atomic Number: 3 1s: 2s: 2p: 3s: 3p: 4s: 3d: 4p: 5s:
The image below shows two types of plant cells under a microscope.
root cells and leaf cells
Which statement explains the difference in chloroplasts between the two types of plant cells?
Unlike the leaf cells, the root cells have no chloroplasts because root cells do not need to produce or use energy. Option A
What is the cell?We have to note that the cell is the smallest part of an organism that can have independent existence. We know that the microscope is the device that we can be able to use to view the cells.
Now, we know that the cell is composed of the organelles of the cell. The organelles of the cell include the chloroplast of the cell as well as the cell wall of the cell.
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Missing parts;
The image below shows two types of plant cells under a microscope.
root cells and leaf cells
Which statement explains the difference in chloroplasts between the two types of plant cells?
A.
Unlike the leaf cells, the root cells have no chloroplasts because root cells do not need to produce or use energy.
B.
Unlike the root cells, the leaf cells have many chloroplasts because leaf cells produce sugars for the plant.
C.
The root cells have smaller chloroplasts because root cells do not need to store food and water.
D.
The leaf cells have larger chloroplasts because leaf cells need more support and a stronger structure.
Arrange the steps of glycogen degradation in their proper order.
Hormonal signals trigger glycogen breakdown.
--------------------------------------------------------------
Glucose 6-phosphate undergoes further metabolic processing.
Which enzymes are required for glycogen degradation?
O phosphoglucomutase
O transferase
O glycogen phosphorylase
O phosphoglycerate mutase
O a-1,6-glucosidase
The breakdown of glycogen by the liver to maintain stable blood glucose levels requires phosphorylase kinase enzymes.
Glycogen deterioration is caused by what?The body gets its energy primarily from glycogen. The liver houses glycogen storage. Enzymes are certain proteins that convert glycogen to glucose when the organism need extra energy. In the body, they release the glucose.
Depletion of glycogen is it beneficial?You must avoid glycogen depletion. Due to extended periods of strenuous exercise, this occurs when the glycogen stores are depleted. you may not be eating enough carbohydrates. It will result in persistent fatigue, decreased strength, decreased endurance, and a general deterioration in athletic performance.
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Zinc Sulfide reacts with oxygen according to the reaction:
2ZnS (s) + 3 O2(g) -> 2 ZnO (s) + 2 SO2 (g)
A reaction mixture contains 4.2 moles of zinc sulfide and 6.8 moles of oxygen. Once the reaction occurred as completely as possible, what amount in moles is left of the excess reactant?
The amount in moles of the excess reactant left is 0.5 mole.
Balanced equation- 2ZnS (s) + 3O₂(g) --> 2ZnO (s) + 2SO₂(g).
What is another name for zinc sulfide?
A typical pigment known as sachtolith is zinc sulphide.From the balanced equation,
2 moles of ZnS reacted with 3 moles of O₂
How to determine the excess reactant
From the balanced equation,
2 moles of ZnS reacted with 3 moles of O₂
Therefore,
4.2 moles of ZnS will react with =(4.2 × 3) / 2 = 6.3 moles of O₂
From the calculations made above, we can see that only 6.3 moles of O₂ out of 6.8 moles given, is required to react completely with 4.2 moles of ZnS.
Thus, ZnS is the limiting reactant and O₂ is the excess reactant.
How to determine the mole of the excess reactant remaining
The excess reactant is O₂. Thus the mole remaining after the reaction can be obtained as illustrated below:
Mole of O₂ given = 6.8 moles
Mole of O₂ that reacted = 6.3 moles
Mole of O₂ remaining =?
Mole of O₂ remaining = (Mole of O₂ given) - (Mole of O₂ that reacted)
Mole of O₂ remaining = 6.8 - 6.3
Mole of O₂ remaining = 0.5 mole
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Copper metal, Cu(s), will spontaneously reduce which of the following?
a) Fe2+ and Ag+
b) Fe2+
c) Ag+
d) Al3+
e) Fe2+ and Al3+
Cu(s), will spontaneously reduce Fe2+ and Ag+. Thus option A is the answer.
A redox (reduction-oxidation) reaction is a chemical reaction in which one species (the reducing agent) loses electrons, while another species (the oxidizing agent) gains electrons. The reducing agent is said to be reduced, while the oxidizing agent is said to be "oxidized." In this case, copper metal, Cu(s), is the reducing agent, and [tex]Fe2+[/tex] and [tex]Ag+[/tex] are the oxidizing agents.
In the redox reaction, copper metal will lose electrons and is oxidized to Cu2+. The Fe2+ and Ag+ ions will gain electrons and be reduced to Fe and Ag, respectively. This process is spontaneous because the final state of the reaction is more stable than the initial state.
The reaction can be written as:
[tex]Cu(s) + Fe^{2+} -- > Cu^{2+} + Fe(s)[/tex]
[tex]Cu(s) + Fe^{2+} -- > Cu^{2+} + Fe(s)[/tex]
In summary, copper metal is a stronger reducing agent than Fe2+ and Ag+ ions, which is why the reaction is spontaneous.
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how many moles of copper are 4.57 x 10^15 atoms of copper?
There will be 7.58*10^-9 moles of copper atoms in 4.57*10^15 atoms of copper.
what is meant by 1 mole?A substance's mole is equivalent to 6.022 x 1023 of that material (such as atoms, molecules, or ions). The term "Avogadro's number" or "Avogadro's constant" refers to the number 6.022 1023. To convert between mass and the number of particles, use the mole concept.
What is the short definition of Avogadro's number?Avogadro's number, which is equal to 6.02214076 1023, is the number of units in one mole of any material (defined as its molecular weight in grams). Depending on the substance and the nature of the reaction, the units may be electrons, atoms, ions, or molecules.
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