What is the theoretical yield of chromium that can be produced by the reaction of 40.0 g of Cr2O3 with 8.00 g of aluminum according to the chemical equation below? 2Al + Cr2O3 $\rarr$Al2O3 + 2Cr

A) 7.7 g B) 15.4 g C) 27.3 g D) 30.8 g E) 49.9 g A) 7.7 g B) 15.4 g C) 27.3 g D) 30.8 g E) 49.9 g

What is the coefficient of H2O when the following equation is properly balanced? ___ Al4C3 + ___ H2O $\rarr$ ___ Al(OH)3 + ___ CH4

A) 3 B) 4 C) 6 D) 12 E) 24 A) 3 B) 4 C) 6 D) 12 E) 24

Calculate the mass of C in 5.46 g of C2H4?

A) 0.455 g C B) 4.68 g C C) 65.6 g C D) 13.1 g C E) 24.0 g C A) 0.455 g C B) 4.68 g C C) 65.6 g C D) 13.1 g C E) 24.0 g C

Calculate the mass of O in 4.36 g of Cl2O7?

A) 30.5 g O B) 48.8 g O C) 11.2 g O D) 69.8 g O E) 2.67 g O A) 30.5 g O B) 48.8 g O C) 11.2 g O D) 69.8 g O E) 2.67 g O

Ammonia reacts with oxygen to form nitric oxide and water vapor: 4NH3 + 5O2 $\rarr$ 4NO + 6H2O What is the theoretical yield of water, in moles, when 40.0 g NH3 and 50.0 g O2 are mixed and allowed to react?

A) 1.30 mol B) 1.57 mol C) 1.87 mol D) 3.53 mol E) None of these. A) 1.30 mol B) 1.57 mol C) 1.87 mol D) 3.53 mol E) None of these.

The mineral pyrolusite is a compound of 55Mn and 16O.If 63% of the mass of pyrolusite is due to manganese, what is the empirical formula of pyrolusite?

A) MnO B) Mn2O C) Mn2O2 D) MnO2 E) none of these A) MnO B) Mn2O C) Mn2O2 D) MnO2 E) none of these

Calculate the molar mass of Ba(NO3)2.

A) 199.3 g/mol B) 323.3 g/mol C) 247.3 g/mol D) 261.3 g/mol E) 398.6 g/mol A) 199.3 g/mol B) 323.3 g/mol C) 247.3 g/mol D) 261.3 g/mol E) 398.6 g/mol

Exam 3: Mass Relationships in Chemical Reactions

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What is the theoretical yield of chromium that can be produced by the reaction of 40.0 g of Cr₂O₃ with 8.00 g of aluminum according to the chemical equation below? 2Al + Cr₂O₃ $\rarr$ Al₂O₃ + 2Cr

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Question 121

A compound with a percent composition by mass of 24.61% C, 2.75% H, and 72.64% Cl has a molar mass of 292.82 g/mol.What is the empirical formula of the compound?

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Question 122

Calculate the average atomic mass of silver using the following data:

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Question 123

What is the coefficient of H₂O when the following equation is properly balanced? _ Al₄C₃ + _ H₂O $\rarr$ _ Al(OH)₃ + _ CH₄

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Question 124

Balance the following chemical equation: Al(s)+ Co(NO₃)₂(aq) $\rarr$ Al(NO₃)₃(aq)+ Co(s)

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Question 125

Calculate the mass of C in 5.46 g of C₂H₄?

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Question 126

Calculate the mass of O in 4.36 g of Cl₂O₇?

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Question 127

If 0.274 moles of a substance weighs 62.5 g, what is the molar mass of the substance, in units of g/mol?

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Question 128

Ammonia reacts with oxygen to form nitric oxide and water vapor: 4NH₃ + 5O₂ $\rarr$ 4NO + 6H₂O What is the theoretical yield of water, in moles, when 40.0 g NH₃ and 50.0 g O₂ are mixed and allowed to react?

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Question 129

The percent composition by mass of an unknown chlorinated hydrocarbon was found to be 37.83% C, 6.35% H, and 55.83% Cl by mass.What is the empirical formula of this compound?

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Question 130

How many moles of iron are present in an iron cylinder that weighs 25 g?

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Question 131

Which of the following samples contains the greatest number of atoms?

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Question 132

The mineral pyrolusite is a compound of ⁵⁵Mn and ¹⁶O.If 63% of the mass of pyrolusite is due to manganese, what is the empirical formula of pyrolusite?

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Question 133

Calculate the percent composition by mass of oxygen in Na₂CO₃.

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Question 134

Calculate the molar mass of Ba(NO₃)₂.

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Question 135

Acetylene gas, HCCH(g), can be generated in the laboratory by adding calcium carbide to excess water, as shown in the following reaction CaC₂(s)+ H₂O(l) $\rarr$ HCCH(g)+ CaO(s) How many grams of CaC₂ would be required to generate 0.20 moles of HCCH(g)?

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Question 136

Calculate the mass of FeS formed when 9.42 g of iron reacts with 8.50 g of sulfur according to the following reaction. Fe(s)+ S(s) $\rarr$ FeS(s)

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Question 137

A 0.600 g sample of a compound of arsenic and oxygen was found to contain 0.454 g of arsenic.What is the empirical formula of the compound?

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Question 138

Calculate the average atomic mass of lithium using the following data:

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Question 139

What is the coefficient of H₂O when the equation below is properly balanced? _ PCl₃(l)+ _ H₂O(l) $\rarr$ _ H₃PO₃(aq)+ _ HCl(aq)

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Question 140

Showing 121 - 140 of 194

Exam 3: Mass Relationships in Chemical Reactions

What is the theoretical yield of chromium that can be produced by the reaction of 40.0 g of Cr2O3 with 8.00 g of aluminum according to the chemical equation below? 2Al + Cr2O3 →\rarr→ Al2O3 + 2Cr

A compound with a percent composition by mass of 24.61% C, 2.75% H, and 72.64% Cl has a molar mass of 292.82 g/mol.What is the empirical formula of the compound?

Calculate the average atomic mass of silver using the following data:

What is the coefficient of H2O when the following equation is properly balanced? ___ Al4C3 + ___ H2O →\rarr→ ___ Al(OH)3 + ___ CH4

Balance the following chemical equation: Al(s)+ Co(NO3)2(aq) →\rarr→ Al(NO3)3(aq)+ Co(s)

Calculate the mass of C in 5.46 g of C2H4?

Calculate the mass of O in 4.36 g of Cl2O7?

If 0.274 moles of a substance weighs 62.5 g, what is the molar mass of the substance, in units of g/mol?

Ammonia reacts with oxygen to form nitric oxide and water vapor: 4NH3 + 5O2 →\rarr→ 4NO + 6H2O What is the theoretical yield of water, in moles, when 40.0 g NH3 and 50.0 g O2 are mixed and allowed to react?

The percent composition by mass of an unknown chlorinated hydrocarbon was found to be 37.83% C, 6.35% H, and 55.83% Cl by mass.What is the empirical formula of this compound?

How many moles of iron are present in an iron cylinder that weighs 25 g?

Which of the following samples contains the greatest number of atoms?

The mineral pyrolusite is a compound of 55Mn and 16O.If 63% of the mass of pyrolusite is due to manganese, what is the empirical formula of pyrolusite?

Calculate the percent composition by mass of oxygen in Na2CO3.

Calculate the molar mass of Ba(NO3)2.

Acetylene gas, HCCH(g), can be generated in the laboratory by adding calcium carbide to excess water, as shown in the following reaction CaC2(s)+ H2O(l) →\rarr→ HCCH(g)+ CaO(s) How many grams of CaC2 would be required to generate 0.20 moles of HCCH(g)?

Calculate the mass of FeS formed when 9.42 g of iron reacts with 8.50 g of sulfur according to the following reaction. Fe(s)+ S(s) →\rarr→ FeS(s)

A 0.600 g sample of a compound of arsenic and oxygen was found to contain 0.454 g of arsenic.What is the empirical formula of the compound?

Calculate the average atomic mass of lithium using the following data:

What is the coefficient of H2O when the equation below is properly balanced? ___ PCl3(l)+ ___ H2O(l) →\rarr→ ___ H3PO3(aq) + ___ HCl(aq)

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What is the theoretical yield of chromium that can be produced by the reaction of 40.0 g of Cr₂O₃ with 8.00 g of aluminum according to the chemical equation below? 2Al + Cr₂O₃ $\rarr$ Al₂O₃ + 2Cr

What is the coefficient of H₂O when the following equation is properly balanced? _ Al₄C₃ + _ H₂O $\rarr$ _ Al(OH)₃ + _ CH₄

Balance the following chemical equation: Al(s)+ Co(NO₃)₂(aq) $\rarr$ Al(NO₃)₃(aq)+ Co(s)

Calculate the mass of C in 5.46 g of C₂H₄?

Calculate the mass of O in 4.36 g of Cl₂O₇?

Ammonia reacts with oxygen to form nitric oxide and water vapor: 4NH₃ + 5O₂ $\rarr$ 4NO + 6H₂O What is the theoretical yield of water, in moles, when 40.0 g NH₃ and 50.0 g O₂ are mixed and allowed to react?

The mineral pyrolusite is a compound of ⁵⁵Mn and ¹⁶O.If 63% of the mass of pyrolusite is due to manganese, what is the empirical formula of pyrolusite?

Calculate the percent composition by mass of oxygen in Na₂CO₃.

Calculate the molar mass of Ba(NO₃)₂.

Acetylene gas, HCCH(g), can be generated in the laboratory by adding calcium carbide to excess water, as shown in the following reaction CaC₂(s)+ H₂O(l) $\rarr$ HCCH(g)+ CaO(s) How many grams of CaC₂ would be required to generate 0.20 moles of HCCH(g)?

Calculate the mass of FeS formed when 9.42 g of iron reacts with 8.50 g of sulfur according to the following reaction. Fe(s)+ S(s) $\rarr$ FeS(s)

What is the coefficient of H₂O when the equation below is properly balanced? _ PCl₃(l)+ _ H₂O(l) $\rarr$ _ H₃PO₃(aq)+ _ HCl(aq)