The element oxygen consists of three naturally occurring isotopes: 16O, 17O, and 18O.The atomic mass of oxygen is 16.0 amu.What can be implied about the relative abundances of these isotopes?

A) More than 50% of all O atoms are 17O. B) Almost all O atoms are 18O. C) Almost all O atoms are 17O. D) The isotopes all have the same abundance, i.e.33.3%. E) The abundances of 17O and 18O are very small. A) More than 50% of all O atoms are 17O. B) Almost all O atoms are 18O. C) Almost all O atoms are 17O. D) The isotopes all have the same abundance, i.e.33.3%. E) The abundances of 17O and 18O are very small.

What is the theoretical yield of H2O that can be obtained from the reaction of 4.5 g H2 and excess O2? 2H2(g)+ O2(g)$\rarr$2H2O(g)

A) 4.5 g B) 9.0 g C) 40.g D) 80.g E) 81 g A) 4.5 g B) 9.0 g C) 40.g D) 80.g E) 81 g

How many Cl atoms are in 0.0728 g of PCl3?

A) 4.38 x 1022 Cl atoms B) 1.32 x 1023 Cl atoms C) 3.19 x 1020 Cl atoms D) 9.58 x 1020 Cl atoms E) 1.81 x 1024 Cl atoms A) 4.38 x 1022 Cl atoms B) 1.32 x 1023 Cl atoms C) 3.19 x 1020 Cl atoms D) 9.58 x 1020 Cl atoms E) 1.81 x 1024 Cl atoms

How many moles of Cl atoms are there in 65.2 g CHCl3?

A) 0.548 mol B) 1.09 mol C) 3.30 × 1023 mol D) 1.64 mol E) 3.00 mol A) 0.548 mol B) 1.09 mol C) 3.30 × 1023 mol D) 1.64 mol E) 3.00 mol

How many F atoms are in 5.54 g of F2?

A) 6.02 × 1023 atoms B) 0.146 atoms C) 0.292 atoms D) 8.78 × 1022 atoms E) 1.76 × 1023 atoms A) 6.02 × 1023 atoms B) 0.146 atoms C) 0.292 atoms D) 8.78 × 1022 atoms E) 1.76 × 1023 atoms

A compound with an empirical formula of C2H3Br2 has a molar mass of 373.69 g/mol.What is the molecular formula?

A) C2H3Br2 B) CHBr C) C6H9Br6 D) C4H6Br2 E) C4H6Br4 A) C2H3Br2 B) CHBr C) C6H9Br6 D) C4H6Br2 E) C4H6Br4

Ammonia reacts with oxygen to form nitric oxide and water vapor: 4NH3 + 5O2 $\rarr$ 4NO + 6H2O When 40.0 g NH3 and 50.0 g O2 are allowed to react, which is the limiting reagent?

A) NH3 B) O2 C) NO D) H2O E) No reagent is limiting. A) NH3 B) O2 C) NO D) H2O E) No reagent is limiting.

What is the theoretical yield of vanadium, in moles, that can be produced by the reaction of 2.0 moles of V2O5 with 6.0 moles of calcium based on the chemical reaction below? V2O5(s)+ 5Ca(l)$\rarr$ 2V(l)+ 5CaO(s)

A) 1.0 mol B) 1.6 mol C) 2.0 mol D) 2.4 mol E) 4.0 mol A) 1.0 mol B) 1.6 mol C) 2.0 mol D) 2.4 mol E) 4.0 mol

The mineral manganosite is a compound of 55Mn and 16O.If 77% of the mass of manganosite is due to manganese, what is the empirical formula of manganosite?

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

Exam 3: Mass Relationships in Chemical Reactions

The percent composition by mass of tartaric acid is: 32.01% C, 4.03% H, and 63.96% O.Given that the molecular mass of tartaric acid is 150 amu, determine its molecular formula.

(Short Answer)

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Question 161

Calculate the percent composition by mass of carbon in Na₂CO₃.

(Short Answer)

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Question 162

What is the theoretical yield of ammonia that can be obtained from the reaction of 10.0 g of H₂ and excess N₂? N₂ + 3H₂ $\rarr$ 2NH₃

(Multiple Choice)

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Question 163

The element oxygen consists of three naturally occurring isotopes: ¹⁶O, ¹⁷O, and ¹⁸O.The atomic mass of oxygen is 16.0 amu.What can be implied about the relative abundances of these isotopes?

(Multiple Choice)

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Question 164

Aluminum metal reacts with nitric acid to produce aluminum nitrate and hydrogen gas.Identify the balanced reaction that describes this process.

(Multiple Choice)

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Question 165

Butane is reacted with oxygen gas to form carbon dioxide and water.Write the balanced reaction (omit state symbols (s), (l), (g), (aq), etc.).

(Essay)

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Question 166

The reaction of 60.0 g of aluminum oxide with 30.0 g of carbon produced 22.5 g of aluminum.What is the percent yield for this reaction? Al₂O₃ + 3C $\rarr$ 2Al + 3CO

(Multiple Choice)

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Question 167

What is the theoretical yield of H₂O that can be obtained from the reaction of 4.5 g H₂ and excess O₂? 2H₂(g)+ O₂(g) $\rarr$ 2H₂O(g)

(Multiple Choice)

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Question 168

How many Cl atoms are in 0.0728 g of PCl₃?

(Multiple Choice)

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Question 169

Balance the following chemical equation: P₄O₁₀ + H₂O $\rarr$ H₃PO₄

(Essay)

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Question 170

How many moles of Cl atoms are there in 65.2 g CHCl₃?

(Multiple Choice)

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Question 171

How many grams of silver nitrate are necessary to react completely with 7.000 moles of copper? Cu + 2 AgNO₃ $\rarr$ Cu(NO₃)₂ + 2 Ag

(Short Answer)

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Question 172

How many F atoms are in 5.54 g of F₂?

(Multiple Choice)

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Question 173

A compound with an empirical formula of C₂H₃Br₂ has a molar mass of 373.69 g/mol.What is the molecular formula?

(Multiple Choice)

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Question 174

Ammonia reacts with oxygen to form nitric oxide and water vapor: 4NH₃ + 5O₂ $\rarr$ 4NO + 6H₂O When 40.0 g NH₃ and 50.0 g O₂ are allowed to react, which is the limiting reagent?

(Multiple Choice)

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Question 175

Phosgene, a poisonous gas used during WWI, is composed of 12.1% C, 16.2% O, and 71.1% Cl.What is the empirical formula of phosgene?

(Short Answer)

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Question 176

Balance the following chemical equation: NaNO₃ $\rarr$ NaNO₂ + O₂

(Essay)

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Question 177

The percent composition by mass of a compound is 76.0% C, 12.8% H, and 11.2% O.The molar mass of this compound is 284.5 g/mol.What is the molecular formula of the compound?

(Multiple Choice)

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Question 178

What is the theoretical yield of vanadium, in moles, that can be produced by the reaction of 2.0 moles of V₂O₅ with 6.0 moles of calcium based on the chemical reaction below? V₂O₅(s)+ 5Ca(l) $\rarr$ 2V(l)+ 5CaO(s)

(Multiple Choice)

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Question 179

The mineral manganosite is a compound of ⁵⁵Mn and ¹⁶O.If 77% of the mass of manganosite is due to manganese, what is the empirical formula of manganosite?

(Multiple Choice)

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Question 180

Showing 161 - 180 of 194

Exam 3: Mass Relationships in Chemical Reactions

The percent composition by mass of tartaric acid is: 32.01% C, 4.03% H, and 63.96% O.Given that the molecular mass of tartaric acid is 150 amu, determine its molecular formula.

Calculate the percent composition by mass of carbon in Na2CO3.

What is the theoretical yield of ammonia that can be obtained from the reaction of 10.0 g of H2 and excess N2? N2 + 3H2 →\rarr→ 2NH3

The element oxygen consists of three naturally occurring isotopes: 16O, 17O, and 18O.The atomic mass of oxygen is 16.0 amu.What can be implied about the relative abundances of these isotopes?

Aluminum metal reacts with nitric acid to produce aluminum nitrate and hydrogen gas.Identify the balanced reaction that describes this process.

Butane is reacted with oxygen gas to form carbon dioxide and water.Write the balanced reaction (omit state symbols (s), (l), (g), (aq), etc.).

The reaction of 60.0 g of aluminum oxide with 30.0 g of carbon produced 22.5 g of aluminum.What is the percent yield for this reaction? Al2O3 + 3C →\rarr→ 2Al + 3CO

What is the theoretical yield of H2O that can be obtained from the reaction of 4.5 g H2 and excess O2? 2H2(g)+ O2(g) →\rarr→ 2H2O(g)

How many Cl atoms are in 0.0728 g of PCl3?

Balance the following chemical equation: P4O10 + H2O →\rarr→ H3PO4

How many moles of Cl atoms are there in 65.2 g CHCl3?

How many grams of silver nitrate are necessary to react completely with 7.000 moles of copper? Cu + 2 AgNO3 →\rarr→ Cu(NO3 )2 + 2 Ag

How many F atoms are in 5.54 g of F2?

A compound with an empirical formula of C2H3Br2 has a molar mass of 373.69 g/mol.What is the molecular formula?

Ammonia reacts with oxygen to form nitric oxide and water vapor: 4NH3 + 5O2 →\rarr→ 4NO + 6H2O When 40.0 g NH3 and 50.0 g O2 are allowed to react, which is the limiting reagent?

Phosgene, a poisonous gas used during WWI, is composed of 12.1% C, 16.2% O, and 71.1% Cl.What is the empirical formula of phosgene?

Balance the following chemical equation: NaNO3 →\rarr→ NaNO2 + O2

The percent composition by mass of a compound is 76.0% C, 12.8% H, and 11.2% O.The molar mass of this compound is 284.5 g/mol.What is the molecular formula of the compound?

What is the theoretical yield of vanadium, in moles, that can be produced by the reaction of 2.0 moles of V2O5 with 6.0 moles of calcium based on the chemical reaction below? V2O5(s)+ 5Ca(l) →\rarr→ 2V(l)+ 5CaO(s)

The mineral manganosite is a compound of 55Mn and 16O.If 77% of the mass of manganosite is due to manganese, what is the empirical formula of manganosite?

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Calculate the percent composition by mass of carbon in Na₂CO₃.

What is the theoretical yield of ammonia that can be obtained from the reaction of 10.0 g of H₂ and excess N₂? N₂ + 3H₂ $\rarr$ 2NH₃

The element oxygen consists of three naturally occurring isotopes: ¹⁶O, ¹⁷O, and ¹⁸O.The atomic mass of oxygen is 16.0 amu.What can be implied about the relative abundances of these isotopes?

The reaction of 60.0 g of aluminum oxide with 30.0 g of carbon produced 22.5 g of aluminum.What is the percent yield for this reaction? Al₂O₃ + 3C $\rarr$ 2Al + 3CO

What is the theoretical yield of H₂O that can be obtained from the reaction of 4.5 g H₂ and excess O₂? 2H₂(g)+ O₂(g) $\rarr$ 2H₂O(g)

How many Cl atoms are in 0.0728 g of PCl₃?

Balance the following chemical equation: P₄O₁₀ + H₂O $\rarr$ H₃PO₄

How many moles of Cl atoms are there in 65.2 g CHCl₃?

How many grams of silver nitrate are necessary to react completely with 7.000 moles of copper? Cu + 2 AgNO₃ $\rarr$ Cu(NO₃)₂ + 2 Ag

How many F atoms are in 5.54 g of F₂?

A compound with an empirical formula of C₂H₃Br₂ has a molar mass of 373.69 g/mol.What is the molecular formula?

Ammonia reacts with oxygen to form nitric oxide and water vapor: 4NH₃ + 5O₂ $\rarr$ 4NO + 6H₂O When 40.0 g NH₃ and 50.0 g O₂ are allowed to react, which is the limiting reagent?

Balance the following chemical equation: NaNO₃ $\rarr$ NaNO₂ + O₂

What is the theoretical yield of vanadium, in moles, that can be produced by the reaction of 2.0 moles of V₂O₅ with 6.0 moles of calcium based on the chemical reaction below? V₂O₅(s)+ 5Ca(l) $\rarr$ 2V(l)+ 5CaO(s)

The mineral manganosite is a compound of ⁵⁵Mn and ¹⁶O.If 77% of the mass of manganosite is due to manganese, what is the empirical formula of manganosite?