How many moles of gaseous arsine (AsH3) occupy 0.527 L at STP mol AsH What is the density of gaseous arsine? g/L Enter your answer in the provided box You have 626 ml of chlerine trifluoride gas at 767 mmiig and 28°C. What is the mass(in g) of the sample? How many grams of potassium chlorate decompose to potassium chloride and 344 mL. of O2 at 128°C and 725 torr? 2 KClO3(s) → 2 KCl(s) + 3 O2 (g) Enter your answer in the provided box Repo A 60.8-g sample of dinitrogen monoxide is confined in a 4.73-L. vessel, What is the pressure (in atm) at 114 C? atm Guide
Answers
a. There are 0.0232 mol AsH₃ occupy 0.527 L at STP mol AsH
b. The density of gaseous arsine is 3.43 g/L
c. The mass(in g) of the sample is 2.72 g.
d. There are 1.09 grams of potassium chlorate decompose to potassium chloride
e. The pressure is 9.26 atm
1. Using the ideal gas law, we can solve for the number of moles of AsH3:
PV = nRT
where P = 1 atm (at STP), V = 0.527 L, n = ?, R = 0.08206 L·atm/(mol·K), and T = 273 K
n = (PV)/(RT) = (1 atm)(0.527 L)/(0.08206 L·atm/(mol·K) × 273 K) ≈ 0.0232 mol AsH₃
2. To calculate the density of gaseous AsH₃, we can use the equation:
density = (mass of gas)/(volume of gas)
The molar mass of AsH₃s 77.94 g/mol, so the mass of 0.0232 mol of AsH₃ is:
mass = 0.0232 mol × 77.94 g/mol ≈ 1.81 g
Plugging this value and the given volume into the equation above, we get:
density = 1.81 g / 0.527 L ≈ 3.43 g/L
3. To solve for the mass of chlorine trifluoride gas, we can use the ideal gas law again:
PV = nRT
where P = 767 mmHg (convert to atm by dividing by 760 mmHg/atm), V = 626 mL (convert to L by dividing by 1000 mL/L), n = ?, R = 0.08206 L·atm/(mol·K), and T = 28 + 273 = 301 K
n = (PV)/(RT) = (767/760 atm)(626/1000 L)/(0.08206 L·atm/(mol·K) × 301 K) ≈ 0.0295 mol ClF₃
The molar mass of ClF₃ is 92.45 g/mol, so the mass of 0.0295 mol of ClF₃ is:
mass = 0.0295 mol × 92.45 g/mol ≈ 2.72 g
Therefore, the mass of the sample is approximately 2.72 g.
4. To solve for the mass of KClO3 that decomposes, we need to first calculate the number of moles of O2 produced, using the ideal gas law again:
PV = nRT
where P = 725 torr (convert to atm by dividing by 760 torr/atm), V = 0.344 L, n = ?, R = 0.08206 L·atm/(mol·K), and T = 128 + 273 = 401 K
n = (PV)/(RT) = (725/760 atm)(0.344 L)/(0.08206 L·atm/(mol·K) × 401 K) ≈ 0.0134 mol O2
Since the balanced equation shows that the ratio of KClO₃ to O₂ produced is 2:3, we can say that the number of moles of KClO₃ is:
n(KClO₃) = (2/3) × n(O₂) = (2/3) × 0.0134 mol ≈ 0.00893 mol KClO₃
The molar mass of KClO₃ is 122.55 g/mol, so the mass of 0.00893 mol of KClO₃ is:
mass = 0.00893 mol × 122.55 g/mol ≈ 1.09 g
Therefore, 1.09 g of KClO₃ decompossed
5. Using the ideal gas law:
n = m/M = 60.8 g / 44.02 g/mol = 1.38 mol
P = nRT/V = (1.38 mol) x (0.08206 L·atm/(mol·K) x 387K / 4.73 L
P = 9.26 atm
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Related Questions
in the reduction of 1 mole of O2 to H2O by the enzym laccase, how many moles electrons are transferred?a. 1b. 2c. 4d. 6
Answers
In the reduction of 1 mole of O2 to H2O by the enzym laccase, 4 moles electrons are transferred. The correct option is c.
In the reduction of 1 mole of O2 to H2O by the enzyme laccase, four moles of electrons are transferred.
Laccase is an enzyme that catalyzes the reduction of oxygen to water, using electrons from a substrate. During this process, four electrons are transferred from the substrate to the oxygen molecule, which is reduced to two water molecules. Therefore, the correct answer is (c) 4.
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Which of the following options gives the correct reactant ratio?
2Fe + 3Cl2 2FeCl3
Answers
The correct reactant ratio for the reaction 2Fe + 3Cl2 → 2FeCl3 is 2 moles of iron (Fe) for every 3 moles of chlorine (Cl2).
A balanced chemical equation represents a chemical reaction where the number of atoms of each element is the same on both sides of the equation. This is achieved by adjusting the coefficients placed before the chemical formulas in the equation.The balanced equation for the reaction 2Fe + 3Cl2 → 2FeCl3 indicates that two moles of iron (Fe) react with three moles of chlorine (Cl2) to produce two moles of iron (III) chloride (FeCl3). This is confirmed by the coefficient values of the reactants and products in the equation.For such more questions on reactant ratio
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in the preparation of methyl benzoate what is the purpose of (a) washing the organic layer with sodium bicarbonate solution? (b) washing the organic layer with sodium chloride solution? (c) treating the organic layer with anhydrous sodium sulfate?
Answers
(a) Washing the organic layer with sodium bicarbonate solution helps to remove any remaining acid from the reaction.
(b) Washing the organic layer with sodium chloride solution is done to remove any remaining water from the organic layer.
(c) Treating the organic layer with anhydrous sodium sulfate is done to remove any remaining traces of water that may still be present in the organic layer.
In the preparation of methyl benzoate, washing the organic layer with sodium bicarbonate solution, washing the organic layer with sodium chloride solution, and treating the organic layer with anhydrous sodium sulfate all serve different purposes.
(a) Washing the organic layer with sodium bicarbonate solution helps to remove any remaining acid from the reaction. This is important because the acid can react with the product and cause unwanted side reactions. Sodium bicarbonate is a weak base that reacts with the acid to form carbon dioxide and water, which can be easily removed.
(b) Sodium chloride is a highly soluble salt, and it can help to absorb any water that may still be present in the organic layer. This is important because water can react with the product and cause unwanted side reactions.
(c) Anhydrous sodium sulfate is a highly effective drying agent that can absorb any remaining water in the organic layer. This is important because any remaining water can react with the product and cause unwanted side reactions.
Overall, the purpose of washing the organic layer with sodium bicarbonate solution, washing the organic layer with sodium chloride solution, and treating the organic layer with anhydrous sodium sulfate is to ensure that the product is free from any unwanted side reactions that may occur due to the presence of acid or water. By removing these impurities, the product can be obtained in a purer form, which is important for many chemical applications.
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In which of the following reactions do you predict an increase in entropy (a positive ΔS)?2ClF3(l) + 2 O2(g) → Cl2O(g) + 3OF2(g)2ClF(g) + O2(g) → Cl2O(g) + OF2(g)PCl3(g) + Cl2(g) → PCl5(g)No answer text provided.Si(s) + 2Cl2(g) → SiCl4(g)
Answers
In the reaction Si(s) + 2Cl2(g) → SiCl4(g), we predict an increase in entropy (a positive ΔS). Therefore, the reaction results in an increase in entropy (a positive ΔS).
Entropy is a measure of the disorder or randomness of a system. When the number of particles or molecules in a system increases, the entropy of the system also increases. In the given reaction, we start with solid silicon (Si) and two molecules of chlorine gas (Cl2), which have a lower degree of randomness compared to the products. The products, silicon tetrachloride (SiCl4) and two molecules of chlorine gas (Cl2), have more particles and a higher degree of randomness.
Entropy increases when there is an increase in the number of particles or the disorder of the system. In this reaction, there are four reactant particles (2ClF3 and 2 O2) and four product particles (1 Cl2O and 3 OF2). However, the reactants include a liquid phase (2ClF3), while all the products are in the gas phase. Since gases have higher entropy than liquids due to increased freedom of movement, this reaction results in an increase in entropy.
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what kind of a compounds act as an electrolyte? explain with and example
Answers
Answer:
ionic compounds
Explanation:
just finished ap chem
Answer:
An ionic compound can act as an electrolyte. This is because an electrolyte should allow charges to travel inside it.
e.g = H2SO4, NaCl
Explanation:
Balance the following equation
_MgF2 + _Li2CO3 -> _MgCO3 + _LiF
Answers
Answer:
1 MgF2 + 1 Li2CO3 --> 1 MgCO3 + 2 LiF
Explanation:
A low volume of pores means the rock has low porosity
Answers
A low volume of pores means the rock has low porosity ---- True. A rock with a lot of porosity has the ability to hold a lot of groundwater.
What makes high porosity?Hair with a high porosity can be genetic, meaning it runs in your family. Ordinarily, however, it's brought about by hair handling and styling medicines like fixing, blow-drying, blanching, and other substance applications. Your cuticles may lift or separate due to damage caused by these treatments.
Why is rock porosity significant?A rock is said to have good porosity if there are many spaces between its grains, allowing water to pass through them. A rock with a lot of porosity has the ability to hold a lot of groundwater.
Incomplete question:
A low volume of pores means the rock has low porosity . True or False
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In the formula XS04, the symbol X could represent the element*
O (1) AI
O (2) Ar
O (3) Mg
0 (4) Na
Answers
the decomposition of ozone to oxygen 2o3 to 3o2 what is the elemental composition and net charge of the activated complex for the rate determining step of this reaction
Answers
The amount of reactant and product that changes per unit of time is the rate expression for the reaction. The change in reactant and product concentration over time is depicted by the rate expression.
Although it is unnecessarily simplified, the rate expression (3.35) has been found to be extremely useful in many situations. Let's define a basic reaction so that we can continue our conversation. A reaction is considered to be elementary if the reactants (or reacting molecules) always respond stoichiometrically. For instance, in an elementary reaction, A and B can spontaneously transform into C when they come into contact without needing to do any further action. Therefore, idealised reactions or reaction stages are considered elementary reactions.
The rate of disappearance of ozone is the rate of difference of O3 is divided by 2.
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write the formula for a complex formed between zn2 and oh− with a coordination number of 4.
Write the formula for a complex formed between Zn2 and OH
Answers
The formula for the complex formed between Zn2+ and OH− with a coordination number of 4 is [Zn(OH)4]2−.
When Zn2+ ions combine with four OH− ions, a complex ion is formed. The coordination number of this complex ion is 4, meaning that the Zn2+ ion is surrounded by four OH− ions in a tetrahedral arrangement. The formula for this complex ion is written by placing the Zn2+ ion in the center and surrounding it with four OH− ions. The charge on the complex ion must be balanced, so two negative charges are needed. This is accomplished by adding a 2− superscript to the formula.
In coordination chemistry, a complex ion is formed when a central metal ion or atom is surrounded by other ions or molecules, known as ligands. The coordination number is the number of ligands that are attached to the central metal ion. In the case of Zn2+ and OH−, when four OH− ions surround the Zn2+ ion, a coordination number of 4 is obtained.
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2Mg(s) + O2(g) --> 2MgO(s)
If 2.35 grams of magnesium oxide are formed, how many grams of Mg reacted?
Answers
If 2.35 grams of magnesium oxide are formed, 1.42 grams of Mg reacted in the reaction.
What is magnesium oxide?Magnesium oxide is a chemical compound composed of magnesium and oxygen, with the chemical formula MgO.
2 Mg(s) + O₂(g) -> 2 MgO(s)
From the equation, we can see that 2 moles of magnesium react with 1 mole of oxygen to produce 2 moles of magnesium oxide. This means that the mole ratio of magnesium to magnesium oxide is 2:2, or simply 1:1.
2.35 g MgO x (1 mol MgO/40.31 g MgO) = 0.0583 mol MgO
Since the mole ratio of Mg to MgO is 1:1, we know that 0.0583 moles of Mg also reacted. Now we can use the molar mass of Mg to calculate the mass of Mg that reacted:
0.0583 mol Mg x 24.31 g/mol = 1.42 g Mg
Therefore, 1.42 grams of Mg reacted in the reaction.
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What happens to the reported percent water if the salt thermally decomposes yielding a volatile product
Answers
If the salt thermally decomposes, yielding a volatile product, then the reported percent water in the original sample may be affected.
This is because the water content in the sample may be overestimated due to the presence of the volatile product, which may also be driven off during the heating process. As a result, the reported percent water may be higher than the actual value.
In order to accurately determine the water content of the original sample, the volatile product must be accounted for in the analysis. This can be done by measuring the mass loss of the sample during the heating process, taking into account the mass of the volatile product that is released. Alternatively, the volatile product can be captured and weighed separately, allowing for the accurate determination of the water content in the original sample.
It is important to note that the effect of the volatile product on the reported percent water will depend on the amount and volatility of the product, as well as the analytical method used for determining the water content. Careful consideration and validation of the analytical method is therefore important when analyzing samples that may yield volatile products during thermal decomposition.
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How many bromide ions are there in 2.00g of MgBr2?
Answers
There are 1.31 x 1022 bromide ions in 2.00 g of \(MgBr_2\).
The chemical formula of magnesium bromide (\(MgBr_2\)) contains one magnesium ion (\(Mg2^+\)) and two bromide ions (Br-). To find the number of bromide ions in 2.00 g of \(MgBr_2\), we need to use the molar mass of \(MgBr_2\) to determine the number of moles of \(MgBr_2\) present in 2.00 g of the compound, then use the stoichiometry of the chemical formula to determine the number of bromide ions present. First, we need to calculate the molar mass of \(MgBr_2\). The molar mass of \(MgBr_2\) is equal to the sum of the atomic masses of magnesium (Mg) and two bromine (Br) atoms. The atomic mass of Mg is 24.31 g/mol, and the atomic mass of Br is 79.90 g/mol. Molar mass of \(MgBr_2\) = 24.31 g/mol + (2 x 79.90 g/mol) = 184.11 g/mol Next, we can use the molar mass to determine the number of moles of \(MgBr_2\) present in 2.00 g of the compound: Number of moles of \(MgBr_2\) = mass of \(MgBr_2\) / molar mass of \(MgBr_2\)= 2.00 g / 184.11 g/mol
= 0.0109 mol Finally, we can use the stoichiometry of the chemical formula to determine the number of bromide ions present: Number of bromide ions = 2 x number of moles of \(MgBr_2\)
= 2 x 0.0109 mol
= 0.0218 mol Therefore, there are 0.0218 moles of bromide ions in 2.00 g of \(MgBr_2\). To convert this to the number of bromide ions, we can multiply by Avogadro's number (6.02 x 1023): Number of bromide ions = 0.0218 mol x 6.02 x 1023 ions/mol = 1.31 x 1022 ions
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Which of the following is a non-volatile solute? Select all that apply.
2-propanol (rubbing alcohol)
Methanol
Sodium chloride
Sugar
Answers
What is the maximum number of valence electrons that an atom can have?
Answers
Answer:
8
Explanation:
When a precipitation reaction occurs the resulting mixture of liquid solution and solid precipitate would be considered a___________ Mixture.
Answers
The mixture has more than one phase of matter in it.
When a precipitation reaction occurs the resulting mixture of liquid solution and solid precipitate would be considered a heterogeneous Mixture.
What is precipitation reaction?Chemical reactions known as precipitation reactions take place in aqueous solutions to produce precipitates. Moreover, chemical changes that occur inside the substances are a part of chemical processes.
Moreover, chemical reactions take place between two or even more chemical substances, known as reactants. As a result, the reactants might be solid, gaseous, or liquid in nature. When a precipitation reaction occurs the resulting mixture of liquid solution and solid precipitate would be considered a heterogeneous Mixture.
Therefore, when a precipitation reaction occurs the resulting mixture of liquid solution and solid precipitate would be considered a heterogeneous Mixture.
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The diagram shows what happens when oceanic crust runs into continental crust. What process is being shown in the diagram?
A.
B.
C.
D.
Answers
Answer:
B. subduction
Answer:
the contenental crust was b gone beacause of water that fill in the land also the volcano in the under of water will increase
When the moon changes from all dark to all light, or from new moon to full moon, the moon is said to be...
changing shape
waxing
waning
gibbous
Answers
Answer:
i think its changing shape if I'm wrong I'm sorry
kinetic energy is energy that an object possesses because of its
Answers
Answer:
Explanation:
Kinetic energy is the energy possessed by an object due to its motion. If an object is moving, then it has kinetic energy. If an object has kinetic energy, then it is moving. Many students confuse kinetic energy with potential energy.
Which missing item would complete this alpha decay reaction?
21CF-247 Cm +
Answers
Answer:
the atomic number decreased in 2, from 100 to 100 - 2 = 98. 3) Hence the formed atom has atomic number 98, which is californium, Cf, and the isotope is californium - 253. 4) The item that completes the given alpha decay reaction is: ₉₈²⁵³ Cf.
Explanation:
What causes heat energy when you rub two objects against each other?
Answers
Answer:
Friction is a force that opposes motion. ... When friction acts between two surfaces that are moving over each other, some kinetic energy is transformed into heat energy.
4. What trend in atomic radius occurs down a group on the periodic table?
rind on the periodic table?
Answers
Answer:Atomic radius gets bigger
Explanation:
Atomic radius bigger because not only do the atoms have more and more protons and neutrons, and thus more mass in general, there is also stronger shielding affect. Shielding affect is when electrons closer to the nucleus block the positive charge from reaching electrons farther from the nucleus, and thus those far electrons are not drawn towards the nucleus as strongly, and spread out more, increasing atomic radius.
how many kilograms are 129.569grams?
Answers
0.129569. You have to divide the mass value by 1000.
the concentration of fe2 in a solution is determined by titration with a 0.1569 m permanganate solution. the balanced net ionic equation for the reaction is:
Answers
The net ionic equation for the given condition is: -
MnO4 (aq) + 5Fe2+ (aq) + 8H30+ (aq)— Mn2+ (aq) + 5Fe3+ (aq) + 12H2O(a)
A balanced chemical equation is the equation where all the number of reactant and products are equalized based on the number of moles and concentration.
According to the given condition, we have 0.1569 Molar permanganate solution titrated.
For 1L of solution we have 0.1569 molar permanganate,
Therefore,
1000ml = 0.1569m
19.53ml = 19.53 x 0.1569 / 1000
= 0.00306 moles. = 3.06 x 10^-3 moles.
The ionic equation says that 1 mol of MnO4- reacts with 5 moles of Fe2+ so, 3.06 x 10^-3 reacts with 19.53 ml to give,
19.53ml = 3.06 x 10^-3
30.00 ml = 3.06 x 10^-3 x 30.00/ 19.53
= 4.700 x 10^-3 moles.
This quantity of moles are in the solution required, in the volume i was given (30.00 ml). To get the concentration I have to calculate the moles in 1L.
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Convert 48 g O2 to moles of O2
Answers
Answer:
1.5 moles
Explanation:
O mole weight = 15.999
O2 mole weight = 2 * 15.999 = 31.998 gm
48 / 31. 998 = ~ 1.5 moles
Carbon tetrachloride is a colorless liquid. How many molecules of carbon tetrachloride are in 6.32 mg of that compound?
a. 2.47 x 10^19
b. 5.85 x 10^23
c. 6.82 x 10^29
d. 1.64 x 10^24
Answers
Option A.
The number of molecules of carbon tetrachloride in 6.32 mg of the compound is 2.47 x 10¹⁹ molecules.
What is the molecular mass of Carbon tetrachloride?The molecular mass of Carbon tetrachloride is calculated as follows;
Molecular formula = CCl₄
CCl₄ = (12) + (35.5 x 4)
CCl₄ = 154 g/mol
The number of moles of carbon tetrachloride in 6.32 mg is calculated as follows;
n = reacting mass / molar mass
n = (6.32 x 10⁻³) / (154)
n = 4.1 x 10⁻⁵ moles
1 mole of CCl₄ = 6.02 x 10²³ molecules
4.1 x 10⁻⁵ moles of CCl₄ = ?
= 2.47 x 10¹⁹ molecules
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PLEASE IM VERY CONFUSED
Directions: Write the formulas of the reactants and products, including the symbols for the state,
(s), (l), (g), (aq) - then balance the equations.
8. When a solution of hydrogen chloride is added to solid sodium bicarbonate (NaHCO3), the products are carbon dioxide, water and aqueous sodium chloride.
9. Ethyl alcohol (a liquid), C2H6O, burns in air to produce carbon dioxide and gaseous water.
10. Solid titanium (IV) chloride reacts with water, forming solid titanium (IV) oxide and aqueous hydrogen chloride.
11. During photosynthesis in plants, carbon dioxide and water are converted into glucose, C6H12O6, and oxygen gas.
12. Solutions of calcium hydroxide, Ca(OH)2 and nitric acid, HNO3, react to produce water and aqueous calcium nitrate, Ca(NO3)2.
Answers
Answer:
8. the formula of the products are CO2(g) , H2O (l) and NaCl (aq)
Explanation:
s- solid
g- gas
l- liquid
aq- aqueous, means acid
These are the products of the equation, you can balance this by searching up a video on how to do so, or use a balance equations calculator online. Balancing is very easy tho.
In two or more complete sentences, describe how one of the occupations that you studied would use descriptive statistics when performing their job. Justify your answers in two or more complete sentences. in science
Answers
Answer:
I need an answer someone HELP MEEEEEEE
Using the partial periodic table, which statement is correct?
*Oxygen (O) has more protons than chlorine (Cl).
*Iron (Fe) has more protons than silver (Ag).
*Sodium (Na) has more protons than carbon (C).
*Hydrogen (H) has more protons than helium (He).
Answers
Answer:
Sodium (Na) has more protons than carbon (C).
hope that helps!
by what factor does the rate change if the concentration of hno2 is doubled
Answers
By the factor of 2 the rate change if the concentration of hno2 is doubled.
The rate law describes the relationship between the rate of a chemical reaction and the concentrations of its reactants. When the concentration of one of the reactants is altered, the rate of the reaction also changes correspondingly. The relationship between the rate of the reaction and the concentration of reactants is given by the rate law equation.
A factor is calculated using the following formula:
Factor = New concentration / Original concentration
As per the question, if the concentration of HNO2 is doubled, the factor is calculated as follows:
Factor = New concentration / Original concentration = 2x / x = 2
The factor is 2. It means that if the concentration of HNO2 is doubled, the rate of the reaction will increase by two times.
This is because the rate of the reaction is directly proportional to the concentration of HNO2.
For example, if the original rate is 100 units and the concentration of HNO2 is doubled, the new rate will be 200 units (100 x 2).
In conclusion, the factor by which the rate changes if the concentration of HNO2 is doubled is 2. This implies that the rate of the reaction will double if the concentration of HNO2 is doubled. This is due to the direct proportionality of the rate of the reaction with the concentration of HNO2.
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