Answer:
If a crystal of a coloured soluble chemical, eg potassium manganate(VII), is placed in water, the particles spread out and mix with the water particles. When the potassium manganate(VII) has dissolved it becomes the solute . The water is the solvent . The mixture that results is the solution .
yes have very good day
For every 6 mols of H2 how many mols of h20 will be produced?
For every 2 mols of H2 how many mols of h20 will be produced?
For every 5.67 mols of H2 how many mols of h20 will be produced?
According to stoichiometry, for every 6 moles of hydrogen 6 moles of water is produced.For every 2 moles of hydrogen 2 moles of water is produced.For every 5.67 moles of hydrogen 5.67 moles of water is produced.
What is stoichiometry?It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.
Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.As the stoichiometry of hydrogen to water is 2:2 same number of moles of water will be produced as that of hydrogen, that is 2 and 5.67 moles respectively.
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close problem question content area consider the reaction of c4h10 with o2 to form co2 and h2o. if 6.49 g o2 is reacted with excess c4h10 and 4.80 g of co2 is ultimately isolated, what is the percent yield for the reaction?
The molar mass of C4H10 is 58.12 g/mol, and the molar mass of O2 is 32.00 g/mol. When these two reactants combine, the reaction produces 44.01 g of CO2 for each mole of C4H10 and O2. The percent yield for the reaction is 100.84%.
What is molar mass ?Molar mass is a measure of the mass of a single molecule of a substance and is expressed in units of grams per mole (g/mol). It is calculated by taking the sum of the atomic masses of each atom in the molecule, multiplied by the number of atoms of each kind in the molecule. For example, the molar mass of water (H2O) is 18.015 g/mol, which is calculated by adding the atomic masses of two hydrogen atoms (2 x 1.0079 g/mol) and one oxygen atom (16.00 g/mol). Molar mass is important in chemistry, as it is often used to calculate the number of moles of a substance. It can also be used to help determine the concentration of a solution, and to calculate the mass of an element or compound in a known volume.
balanced equation
2C4H10 + 15O2 -----> 8CO2 + 10H2O
from the balanced equation
15 mol of O2 is giving 8 mol of CO2 this is if you talk in terms of moles
where as if you talk in terms of grams
15 x 32 gr O2 is giveng 8 x 44 gr CO2
480 gr O2 is giving 352 gr CO2
6.49 gr O2 will give 6.49 x 352 / 480 = 4.759 gr of CO2 this is theretically from the equation
but actually he got 4.80 gr
now
% of yield = actual / thritical x 100
= 4.80 / 4.76 x 100
= 100.84%
Thus, The percent yield for the reaction is 100.84%.
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Question 2
If you are running the reaction below and you have excess K and 0.43 mol Cl₂, what
mass of KCI will you produce? Please round your answer to two digits after the
decimal point and don't forget units and substance!
K+ Cl₂ --> KCI
In the reaction having an excess of K and 0.43 mol Cl₂, the mass of KCI that will be produced is 64 grams.
In the reaction equation
K+ Cl₂ → KCI
We balance the reactions.
2K+ Cl₂ → 2KCI
1 mole of Cl₂ will give 2 moles of KCl
Because of that,
0.43 mol Cl2 will result from = 0.43 × 2 = 0.86 mol KCl.
Then the mass of KCl is:
Moles of KCl = 0.86 mol
Molar mass of KCl = 74.55 g/mol
So:
Moles = mass/molar mass
Mass of KCl = moles × molar mass
Mass of KCl = 0.86 × 74.55
Mass of KCl = 64 grams
So, the mass of KCl is 64 grams.
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Some help on these questions would be awesome:
1) An 88 g sample of carbon dioxide is found to contain 24g of carbon and 64g of oxygen. What is the percentage by mass of all elements? Give answers to the nearest whole number.
3) A 57 g sample of sodium carbonate reportedly contains 25g of sodium, 18g of carbon and 20g of oxygen. Do you accept this analysis? Explain why or why not.
5) Pink gold contains 75% gold, 20% copper and 5% silver by mass. Determine the mass of each metal in a pink gold necklace that weighs 20g.
6a) Carbon monoxide is 43% carbon by mass; nitrous oxide is 30% nitrogen by mass. For both gases, the remainder is oxygen. In a mixture containing 5g of each gas, what is the mass of oxygen present?
6b) A 5g sample of carbon monoxide is mixed with 4g of nitrous oxide and 3 g of sulfur dioxide. Sulfur dioxide is 50% sulfur by mass, the balance is oxygen. What is the percentage by mass of oxygen and of sulfur present in the mixture? Use the mass compositions given in part a.
buprofen has the following mass percent composition: c 75.69%, h 8.80%, o 15.51%. what is the empirical formula of ibuprofen?
The empirical formula of ibuprofen is C13H18O2.
Moles of carbon = 75.69⋅g / 12.011⋅g⋅mol ^−1 = 6.30⋅mol.
Moles of hydrogen = 8.80⋅g / 1.00794⋅g⋅mol ^−1 =8.73⋅mol.
Moles of oxygen = 15.51⋅g / 15.999⋅g⋅mol ^−1 =0.969⋅mol.
The empirical formula is the simplest whole number ratio defining constituent atoms in a species. So we double this trial formula to get;
C13H18O2
The empirical formula is a simple representation of the relative number of atoms of each element present in a chemical compound. It gives the lowest whole number ratio of atoms in a molecule. For example, the empirical formula of glucose is CH2O, which represents that there are 2 hydrogen atoms, 1 carbon atom, and 6 oxygen atoms in one molecule of glucose. The empirical formula is different from the molecular formula, which gives the exact number of atoms of each element in a molecule.
Empirical formulas are useful for determining the molecular structure of a compound based on its elemental composition. They can also be used to calculate the molecular formula by multiplying the coefficients in the empirical formula by a factor that gives the correct molecular weight.
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the process of is an example of weathering in which rock splits through repeated freezing ad thawing
This process is known as frost wedging or freeze-thaw weathering. It occurs when water gets into cracks and crevices in rocks and then freezes, expanding and eventually forcing the rock to split apart.
What is wedging?
Wedging is a technique used in woodworking to join two pieces of wood together. It is done by driving a wedge (usually a metal wedge) between the two pieces of wood. The wedge then forces the wood apart, creating a tight fit. This is a great way to connect two pieces of wood without the need for nails or screws. Wedging is a strong and durable joint, making it a popular choice for woodworking projects. It can also be used to create texture in a material, by creating a pattern of cracks. Wedging is a traditional technique that has been used by artisans and sculptors for centuries.
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has the fcc crystal structure an atomic radius of and an atomic weight of what is its theoretical density?
The atomic radius and atomic weight of an element have no bearing on the theoretical density of its crystal structure.
What is atomic radius?
Atomic radius is the measure of the size of an atom. It is the distance from the center of the nucleus of an atom to the outermost shell of electrons. The atomic radius of an element is determined by the number of protons and electrons present in the atom. Generally, the atomic radius decreases across a period and increases down a group. This is because the number of protons and electrons increase down a group, thus, the outermost shell of electrons is held more tightly due to increased attraction from the nucleus.
The theoretical density of a crystal structure depends on the density of the elements that make up the structure, the number and arrangement of those atoms, and the size of the unit cell.
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During the vernal equinox, what occurrence takes place that happens only twice a year?
a. The Sun’s rays are perpendicular to the Tropic of Cancer, causing 12 hours of daylight on both Northern and Southern Hemispheres.
b. The Sun’s rays are perpendicular to the Tropic of Capricorn, causing 12 hours of daylight on both Northern and Southern Hemispheres.
c.The Sun’s rays are perpendicular to the Equator, causing 12 hours of daylight on both Northern and Southern Hemispheres.
d. The Sun’s rays are perpendicular to the Prime Meridian, causing 12 hours of daylight on both Northern and Southern Hemispheres.
Answer:
c.The Sun’s rays are perpendicular to the Equator, causing 12 hours of daylight on both Northern and Southern Hemispheres.
consider the following equilibrium mixture in a closed system: h2o(g) co(g) h2(g) co2(g). explain what would happen to the equilibrium upon the addition of steam?
When steam (H₂O(g)) is added to the equilibrium mixture of H₂O(g), CO(g), H₂(g), and CO₂(g), it will affect the position of the equilibrium.
The reaction between CO and H₂ to form CO₂ and H₂O is exothermic, meaning that it releases heat, and is described by the following equation:
CO(g) + H₂(g) ⇔ CO₂(g) + H₂O(g)
When steam is added to the system, it will increase the concentration of H₂O(g), which acts as a reactant in the forward reaction and a product in the reverse reaction. This will shift the equilibrium towards the reactants (CO(g) and H₂(g)) to maintain a constant concentration of products. The addition of steam will decrease the concentration of CO₂(g) and H₂(g) and increase the concentration of CO(g) and H₂O(g).
This shift in the equilibrium position will cause the reaction to be more favorable towards the formation of CO and H₂O, which are the products of the reaction, rather than CO₂ and H₂, which are the reactants. This is because the equilibrium constant for the reaction (Kc) is proportional to the product of the concentrations of the products over the product of the concentrations of the reactants.
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explain how alcohol fermentation starts with glucose and yields ethanol. be sure to stress how nad is recycled.
Alcohol fermentation, also known as ethanol fermentation, is a process that starts with glucose and yields ethanol as the end product.
What is ethanol fermentation?Ethanol fermentation is a biochemical process in which sugars such as glucose, fructose, and sucrose are converted into cellular energy and ethanol.
It is an anaerobic process, meaning it takes place in the absence of oxygen. The process involves the conversion of glucose into pyruvate, followed by the conversion of pyruvate into ethanol and carbon dioxide.
The glucose is first converted into pyruvate through glycolysis, a process that requires energy in the form of NAD+. During glycolysis, NAD+ is used to facilitate the conversion of glucose into pyruvate, and NADH is generated.
In the second step of ethanol fermentation, the pyruvate is converted into ethanol and carbon dioxide. This process is facilitated by enzymes called pyruvate decarboxylase and alcohol dehydrogenase, which require the energy from NADH to catalyze the reaction. As NADH is used, NAD+ is regenerated. This is important, as it allows glycolysis to continue in the absence of oxygen.
Overall, the process of alcohol fermentation starts with glucose and yields ethanol as the end product. It is an anaerobic process, meaning that it does not require oxygen
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Which test uses nuclear science to test chemicals within the hair shaft?answer choicesserologyneutron activation analysisfingerprint analysisdisk analysis
Short Tandem Repeat (STR) analysis uses nuclear science to test chemicals within the hair shaft.
What is nuclear science?
Atomic nuclei, their components, and interactions, as well as other types of nuclear matter, are all studied in the field of physics known as nuclear physics. Atomic physics, which examines the atom in its entirety, including its electrons, should not be confused with nuclear physics.
Hair microscopy is used to examine the end of a hair and determine whether it has a root in order to determine whether a human hair sample is suitable for nuclear DNA analysis. If so, the sample can be examined using a short tandem repeat (STR) analysis, a nuclear DNA testing method. It is not possible to send hair that has been shed without a root for this kind of testing, but the hair shaft can still be tested for mitochondrial DNA (mtDNA).
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the heat of vaporization for ethanol is 0.826 kj/g 0.826 kj/g . calculate the heat energy in joules required to boil 75.25 g 75.25 g of ethanol.
The heat energy required to boil 75.25 g of ethanol is 61.05 kJ or 61,050 J.
The heat of vaporization is the amount of heat energy required to convert a given amount of a substance from its liquid state to its gaseous state. It is expressed in units of energy per unit of mass, such as joules per gram or kilojoules per gram.
In this case, the heat of vaporization for ethanol is given as 0.826 kJ/g. To calculate the heat energy in joules required to boil a specific mass of ethanol, we multiply the heat of vaporization by the mass of ethanol.
For example, if we want to calculate the heat energy required to boil 75.25 g of ethanol, we simply multiply the heat of vaporization by the mass of ethanol:
0.826 kJ/g * 75.25 g = 61.05 kJ
So, the heat energy required to boil 75.25 g of ethanol is 61.05 kJ or 61,050 J.
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hydrochloric acid solution with a ph of 2 splashes in your eye. you immediately move to the nearest eye wash station to flush your eye. how long should you flush your eye?
When hydrochloric acid solution with a ph of 2 splashes in your eye we shoiuld:Use water to clean your eye. For at least 20 minutes, soak in pristine, lukewarm tap water. Use whichever of these methods takes the least time.
Step inside the shower and gently spray your forehead over the troubled eye. If both of your eyes are afflicted, you might also aim the stream at your nose's bridge. Keep the afflicted eye or eyes' lids open.
Turn your head to the side and lower it. Hold your afflicted eye's lids open while it is submerged in a softly flowing faucet. Use the eye-rinse station on the job site if you have access to one.
It could be ideal for young children to lie down in the bathtub or lean back over a sink. Pour water in a slow stream.
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Pentene, C5H10 (molar mass = 70.15 g/mol) has a heat of vaporization of 29.82 KJ/mol. How many moles of pentene, at its boiling point, can be vaporized with the addition of 88 J of energy? (Round your answer to the correct number of significant figures.)
The amount of energy required to evaporate a given number of moles of pentene is given by the formula:
ΔHvap = energy/mole Rearranging the formula gives:
Mol = Energy/ΔHvap Substituting the given values, we get:
mol = (88 J) / (29.82 kJ/mol) = 0.0029488 mol Rounding to the correct number of significant digits gives:
Moles = 0.003 Moles
Thus, 0.003 moles of pentene can be evaporated while supplying 88 J of energy.
What is evaporation?
When a liquid becomes a gas, this process is called evaporation. If you boil water in a pot, you can observe the evaporation. Evaporation is done in two ways:evaporation and boiling.
What is the difference between vaporize and vaporize?
Evaporation is defined as a phase transition of a compound or element that occurs during the boiling or sublimation process. Evaporation is just a type of evaporation that normally occurs at temperatures below the boiling point.
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question at position 1 sand is mostly composed of small particles of silicon dioxide. to what materials class would you classify sand?
Sand is absolutely composed of small particles of silicon dioxide. Sand can be classified as ceramics.
The silicon dioxide is a compound. It is an oxide of Silicon. The oxide are formed by the reaction of an element with the oxygen. In silicon dioxide, the silicon reacts with two oxygen molecule to form silicon dioxide. So, the two elements present in the silicon dioxide would be silicon and oxygen.
Ceramics can be defined as inorganic non-metallic materials which harden at high temperatures. The atomic structure of ceramics can be crystalline, non-crystalline, or semi-crystalline. However, most ceramics have a crystalline atomic structure.
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a solution contains 0.020 m ca2 and 0.010 m ag . a) can 99% of ca2 be precipitated by sulfate without precipitating ag ?
No, 99% of Ca2+ cannot be precipitated by sulfate without precipitating Ag+.
What is sulfate?Sulfate is an anion composed of sulfur and oxygen atoms, with the chemical formula SO4−2. It is a polyatomic anion that is the conjugate base of sulfuric acid, H2SO4. Sulfates are found in many natural minerals and in synthetic compounds. They are used in a variety of industrial applications, including in detergents, fertilizers, dyes, and pigments. Sulfates are also used in the production of paper, textiles, and pharmaceuticals. In addition to their industrial uses, sulfates are also released into the environment through natural processes, such as volcanic eruptions and weathering of rocks.
When Ca2+ and Ag+ are both present in a solution, they will both form insoluble sulfates, and the precipitation of Ca2+ will not be selective. The precipitation of either ion requires a large excess of sulfate ions to reach 99%.
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Describe how rate relashionships and activation energy are important on chemical reactions.
Lower reaction rates result from higher activation energies.
What function does activation energy serve in chemical reactions?
Exothermic reactions, like all other chemical reactions, require activation energy to start. Reactants need activation energy to move together, overcome repellent forces, and start bond breaking.
The term "rate of reaction" or "reaction rate" refers to the speed at which reactants transform into products. The rate of a chemical reaction and its activation energy are closely related. Particularly, the higher the activation energy, the slower the chemical reaction will proceed. This is because molecules can only complete a reaction after overcoming the activation energy barrier.
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what is the corect formula for the ionic compound that would result from the combination of lithium and sulfur
The correct formula for the ionic compound that would result from the combination of lithium and sulfur is Lithium sulfide.
An ionic compound is composed of cation and anion, that are strongly held together by strong ionic interactions. They are made up of particles that are arranged in a repeating pattern. Sulfur and lithium can form an ionic compound named lithium sulfide. Sulfur exists are sulfide with -2 charge on it while lithium belong to alkali metals exhibiting +1 charge or valency.
Thus, the compound so formed is lithium sulfide with the molecular formula as Li2S.
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You are conducting a calorimetry experiment using a calorimeter with 500mL of water in its outer chamber to determine the enthalpy of reaction of a chemical reaction. The initial temperature of the water is 25°C. After the reaction, the temperature of the water is 62. 8°C. Disregarding any heat loss to the walls of the container, calculate the ΔHr0. The specific heat of water is 4. 18J/(g•K)
-16.2 kJ is the ΔHr0 of the calorimeter.
The only question is to perform a calorimeter experiment using a calorimeter with 500 mL of water in the outer chamber to determine the reaction enthalpy of the chemical reaction. The initial temperature of the water is 25 degrees. The temperature of the water after the reaction is 457.4 degrees Celsius. To do this, calculate H in relation to the heat loss through the walls of the vessel. F. Here the volume of water is 500 ml, which corresponds to 57.4 °C at 25 °C. This corresponds to 32.4°C. The heat capacity of water is given as 4.18 Joules. Q is known to be equal to structure T. So in 4.18 32.4 is equivalent to 500g. Multiply this to -16.2 kJ. Therefore -16.2 kJ is the ΔHr0 of the calorimeter.
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Carl has noticed a lot of litter in the stream near his house. Most of the litter is made up of empty plastic bottles. Which of the following is a scientific question that Carl could test about the litter in the stream?
A scientific question that Carl could test about the litter in the stream is Do the chemicals in plastic harm fish in the stream. Therefore, the correct option is option C.
What is water pollution?Water pollution is defined as the discharge of pollutants into underground groundwater or into lakes, rivers, rivers, estuaries, including seas to the extent that the contaminants interfere with beneficial water usage or the normal functioning of ecosystems.
Water pollution may involve the discharge of energy into bodies of water, in the shape of radioactivity or heat, in addition to the release of things such as chemicals, debris, or germs. A scientific question that Carl could test about the litter in the stream is Do the chemicals in plastic harm fish in the stream.
Therefore, the correct option is option C.
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True or False?
Rehydrating food makes it more prone to spoilage.
Answer: When foods are sufficiently dehydrated, microorganisms cannot grow and foods will not spoil.
yes
the primary chemical composition of kidney stones commonly includes ca3(po4)2 (calcium phosphate), cac2o4 (calcium oxalate), and mgnh4po4 (magnesium ammonium phosphate). the metal ions in these compounds are:
The metal ions in these compounds are formed by the two-electron oxidation of neutral metal atoms.
Oxidation is a chemical reaction in which an atom loses electrons to become positively charged. This process results in the formation of an oxidized species and a reduced species. In other words, one species loses electrons while the other gains electrons. The oxidized species is called the oxidant, and the reduced species is called the reductant. Oxidation can occur in both organic and inorganic compounds.
For example, the oxidation of iron in air produces iron oxide (rust). In biological systems, oxidation reactions are an essential part of cellular metabolism, providing energy for the organism. The process of oxidation is crucial for many biological and physical processes, but it is also important to control and prevent excessive oxidation, in order to maintain health and protect against disease.
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You know that a gas in a sealed container has a pressure of 111 kPa at 300 K. What will the
pressure be if the temperature rises to 450 K?
a saturated solution of nacl is formed by adding 500.g of nacl to 0.500l of water. the excess solid nacl is filtered from the solution, and after being dried in an oven, the mass was determined to be 346.8g. what is the solubility of nacl? give the answer in units of gml and round the answer to three significant figures.
The solubility of NaCl when a saturated solution of NaCl is formed by adding 500g of NaCl to 0.500l of water where the excess solid NaCl is filtered from the solution is 5.23.
Given the mass of NaCl (m1) = 500g
The volume of water (V) = 0.5L
The reduced mass of NaCl (m2) = 346.8g
Filtered from the solution, the excess solid NaCl is dried in an oven.
The mass of NaCl dissolved in water = m1 - m2 = 500 - 346.8 = 153.2g
The mass of NaCl that will dissolve in 1L of water is = 2 x 153.2 = 306.4g/dm³
58.5g/mole is The molecular weight of NaCl
The amount of a substance in mol that will dissolve in 1 L or 1 dm³ of solution is known as its solubility.
Solubility in (g/dm³)/molar mass equals solubility in (mol/dm³).
(mol/dm³) solubility = 306.4/58.5
5.23 mol/dm³ is the solubility in (mol/dm³)
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8. Time to manipulate dipoles and geometries
Drag the negative dipole over
to a suitable structure on the
molecule
Drag the positive dipole over
to a suitable structure on the
molecule
Put the oval over a bent structure
Put the square over a trigonal planar
structure
Is there a tetrahedral structure for the
hexagon? if so drag the hexagon over to it, if none, explain
This molecule consists of several “local” bonds BUT has one
overall bond type, predict the overall bond type, defend your answer
Dipoles occur when electrons are shared unequally between atoms in the same molecule due to a high difference in the electronegativity of the atoms involved.
What are Dipole?Non-polar covalent bonds, polar covalent bonds, and ionic bonds are the three types of bonding that you need to be familiar with.
The electrons in non-polar covalent bonds are distributed equally among the atoms. The electrons are not distributed equally among the atoms in polar covalent connections. The electrons are transported in ionic connections.
Pauling's scale of electronegativity provides the values for electronegativity.
Therefore, Dipoles occur when electrons are shared unequally between atoms in the same molecule due to a high difference in the electronegativity of the atoms involved.
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Convert 0.73 mol of Br2 to atoms/particles.
4.39×10²³ atoms are present in 0.73 mol of Bromine. Bromine exists in a liquid form of state of matter.
What is bromine?Bromine was found in 1826 in the dregs (bitterns) from the production of sea salt in Montpellier by the French scientist Antoine-Jérôme Balard.
By running chlorine through with an aqueous phase of the leftovers containing magnesium bromide, he was able to release the element. The substance was distillated with manganese dioxide as well as sulfuric acid, resulting in crimson vapours that condensed into a black liquid which is bromine.
number of atom = mole ×6.022×10²³
= 0.73 ×6.022×10²³
=4.39×10²³
Therefore, 4.39×10²³ atoms are present in 0.73 mol of Bromine.
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how much energy is imparted to an electron as it flows through a 8 v battery from the positive to the negative terminal? express your answer in attojoules. express your answer in attojoules to three significant figures.
Explanation:
The energy imparted to an electron as it flows through a battery can be calculated using the equation:
E = qV
where E is the energy in joules, q is the charge of the electron in coulombs, and V is the voltage of the battery in volts.
One electron has a charge of approximately 1.6 x 10^-19 coulombs.
So, for a 8 V battery, the energy imparted to an electron can be calculated as:
E = (1.6 x 10^-19 C) * (8 V) = 1.28 x 10^-18 J
In attojoules, 1 attojoule is 10^-18 J, so:
E = 1.28 x 10^-18 J / (10^-18 J/attojoule) = 1.28 attojoules (to three significant figures).
suppose you dissolve 151 g of calcium bromide in 1.90 l of water. what is the molality of the solution? the molar mass of calcium bromide is 199.89 g/mol, and the density of water is 1.000 g/ml.
The molality of the solution is 0.756 mol/1.90 kg = 0.398 molal.
To calculate the molality of a solution, you must first calculate the moles of the solute present in the solution.
To do this, you must use the molar mass of the solute and the amount of solute present in the solution. In this case, the amount of solute is 151 g of calcium bromide. The molar mass of calcium bromide is 199.89 g/mol [1], so the number of moles of calcium bromide is 151/199.89 = 0.756 mol.
Next, we must calculate the mass of the solvent, which is 1.90 l of water. The density of water is 1.000 g/ml, so the mass of the solvent is 1.90 l x 1.000 g/ml = 1.90 kg.
Finally, we can calculate the molality of the solution using the formula molality = moles of solute/kg of solvent. In this case, the molality of the solution is 0.756 mol/1.90 kg = 0.398 molal.
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For the reaction HCl + NaOH ® NaCl + H2O, how many moles of hydrochloric acid are required to produce 180. g of water?
The molar mass of HCl is 36.46 g/mol, and the molar mass of H₂O is 18.02 g/mol.
What is molar mass?
Molar mass is a physical attribute of a substance that is defined as the mass of a specific substance divided by its mole quantity. It is often represented in grammes per mole (g/mol). Molar mass is used to determine the mass of a specific material based on its molar quantity, or to determine the quantity of a specific substance based on its mass.
In order to calculate the number of moles of HCl required to produce 180. g of water, we must first calculate the number of moles of H2O that are produced. Since the molar mass of H₂O is 18.02 g/mol, we can divide 180. g by 18.02 to get the number of moles produced:
180. g / 18.02 g/mol = 10.00 moles of H₂O
Now, since the reaction is 1:1 (1 mole of HCl for 1 mole of H₂O), we can simply multiply the number of moles of H₂O produced (10.00 moles) by 1 to get the number of moles of HCl required:
10.00 moles H₂O × 1 mole HCl/1 mole H₂O = 10.00 moles HCl
Therefore, in order to produce 180. g of water, 10.00 moles of HCl are required.
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Predict the products of the reactions, then balance the equation and identify the type of reaction.
If the equation is already balanced without coefficients, make sure to note this or I will assume you did not balance it and you will not earn full credit.
Don't forget about concepts you learned last semester including diatomic molecules and how to criss-cross when writing formulas.
A) C4H10 + O2
B) Zn + Cu(NO3)2
C) NaOH + KBr
D) Li + S2
E) H2O
Do this in another file or on a piece of paper and upload that file or picture to this question. You need to upload as a pdf, jpeg, png, or heic. There is a blue "Attach A File" button at the bottom of this question.
The combustion reaction of butane gives carbon dioxide and water as written below:
[tex]\rm C_{4} H_{10} + 8O_{2} \rightarrow 4 CO_{2} + 8H_{2}O[/tex]
Similarly the reaction between Zn and copper nitrate can be written as follows:
[tex]\rm 2 Zn +Cu(NO_{3})_{2} \rightarrow 2ZnNO_{3} + Cu[/tex]
What is balanced equation of reactions ?The balanced equation of a reaction shows the perfect stoichiometry of reactants and products. The number of each elements in the reactants must be equal to their number in the product side.
The crisscross method of the formula is written as giving the charge of the cationic part as the subscript to the anionic part and vice versa.
The remaining reactions can be completed as following :
[tex]\rm NaOH + KBr \rightarrow NaBr + KOH[/tex]
[tex]\rm2 Li + S_{2} \rightarrow 2 Li S[/tex]
Similarly the decomposition of water can be written as:
[tex]\rm 2 H_{2}O \rightarrow H_{2} + O_{2}[/tex]
Find more on balanced chemical equations:
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