Balance the following chemical equation: C + Fe2O3 $\rarr$ Fe + CO

A) 2C + Fe2O3 $\rarr$ 2Fe + 2CO B) 3C + 2Fe2O3 $\rarr$ 2Fe + 3CO C) 2C + 2Fe2O3 $\rarr$ 4Fe + 3CO D) 3C + Fe2O3 $\rarr$ 2Fe + 3CO E) None of the above A) 2C + Fe2O3 $\rarr$ 2Fe + 2CO B) 3C + 2Fe2O3 $\rarr$ 2Fe + 3CO C) 2C + 2Fe2O3 $\rarr$ 4Fe + 3CO D) 3C + Fe2O3 $\rarr$ 2Fe + 3CO E) None of the above

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

A) Al(s) + 3Co(NO3)2(aq) $\rarr$Al(NO3)3(aq) + 3Co(s) B) 2Al(s) + Co(NO3)2(aq) $\rarr$2Al(NO3)3(aq) + Co(s) C) 2Al(s) + 3Co(NO3)2(aq) $\rarr$2Al(NO3)3(aq) + Co(s) D) 2Al(s) + 3Co(NO3)2(aq) $\rarr$ 2Al(NO3)3(aq) + 3Co(s) E) None of the above are balanced A) Al(s) + 3Co(NO3)2(aq) $\rarr$Al(NO3)3(aq) + 3Co(s) B) 2Al(s) + Co(NO3)2(aq) $\rarr$2Al(NO3)3(aq) + Co(s) C) 2Al(s) + 3Co(NO3)2(aq) $\rarr$2Al(NO3)3(aq) + Co(s) D) 2Al(s) + 3Co(NO3)2(aq) $\rarr$ 2Al(NO3)3(aq) + 3Co(s) E) None of the above are balanced

Calculate the average atomic mass of lithium using the following data: $\begin{array}{|l|l|l|} \hline \text { Isotope } & \text { Abundance } & \text { Mass } \\ \hline ^{6} \mathrm{Li} & 7.5 \% & 6.0151~ \mathrm{amu} \\ \hline ^7 \mathrm{Li} & 92.5 \% & 7.0160 ~\mathrm{aum} \\ \hline \end{array}$

A) 6.51 amu B) 6.02 amu C) 6.94 amu D) 7.02 amu E) 6.50 amu A) 6.51 amu B) 6.02 amu C) 6.94 amu D) 7.02 amu E) 6.50 amu

A chemistry student determined the empirical formula for tungsten oxide (WxOy). To do so, he heated tungsten with oxygen in a crucible. The data that he recorded are shown below: $\begin{array}{lr} \text { Weight of crucible } & 11.120 \mathrm{~g} \\ \text { Weight of tungsten } & 8.820 \mathrm{~g} \\ \text { Weight of crucible and product } & 22.998 \mathrm{~g} \end{array}$ What is the empirical formula of tungsten oxide

A) W2O3 B) WO3 C) WO2 D) WO4 E) None of the above A) W2O3 B) WO3 C) WO2 D) WO4 E) None of the above

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

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

The mineral hausmannite is a compound of 55Mn and 16O. If 72% of the mass of hausmannite is due to manganese, what is the empirical formula of hausmannite

A) MnO B) Mn3O C) Mn3O4 D) Mn4O3 E) MnO3 A) MnO B) Mn3O C) Mn3O4 D) Mn4O3 E) MnO3

Calculate the molecular mass of menthol, C10H20O.

A) 156.26 amu B) 140.26 amu C) 29.02 amu D) 48.17 amu E) 137.11 amu A) 156.26 amu B) 140.26 amu C) 29.02 amu D) 48.17 amu E) 137.11 amu

What is the theoretical yield of vanadium, in moles, that can be produced by the reaction of 1.0 mole of V2O5 with 4.0 moles of calcium based on the following chemical reaction V2O5(s) + 5Ca(l) $\rarr$ 2V(l) + 5CaO(s)

A) 1.0 mol B) 1.6 mol C) 2.0 mol D) 0.80 mol E) None of these A) 1.0 mol B) 1.6 mol C) 2.0 mol D) 0.80 mol E) None of these

What is the theoretical yield of vanadium that can be produced by the reaction of 40.0 g of V2O5 with 40.0 g of calcium based on the following chemical reaction V2O5(s) + 5Ca(l) $\rarr$ 2V(l) + 5CaO(s)

A) 5.6 g B) 11.2 C) 20.3 g D) 22.4 g E) 40.0 g A) 5.6 g B) 11.2 C) 20.3 g D) 22.4 g E) 40.0 g

How many sodium atoms are there in 6.0 g of Na3N

A) 3.6 * 1024 atoms B) 4.6 * 1022 atoms C) 1.3 * 1023 atoms D) 0.22 atoms E) 0.072 atoms A) 3.6 * 1024 atoms B) 4.6 * 1022 atoms C) 1.3 * 1023 atoms D) 0.22 atoms E) 0.072 atoms

Exam 3: Mass Relationships in Chemical Reactions

Pressurized metal gas cylinders are generally used to store commonly used gases in the laboratory. At times, it can be easier to chemically prepare occasionally used gases. For example, oxygen gas can be prepared by heating KMnO₄(s) according to the following chemical reaction: 2KMnO₄(s) $\rarr$ K₂MnO₄(s) + MnO₂(s) + O₂(g) The above procedure was carried out starting with 93.2 g of KMnO₄, and it was later determined that all of the KMnO₄ reacted according to the above equation except 11.7 g. What was the percent yield for the reaction

(Multiple Choice)

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Question 161

Balance the following chemical equation: C + Fe₂O₃ $\rarr$ Fe + CO

(Multiple Choice)

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Question 162

Aluminum hydroxide reacts with nitric acid to form aluminum nitrate and water. What mass of water can be formed by the reaction of 15.0 g of aluminum hydroxide with excess nitric acid

(Multiple Choice)

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Question 163

A 1.375 g sample of mannitol, a sugar found in seaweed, is burned completely in oxygen to give 1.993 g of carbon dioxide and 0.9519 g of water. The empirical formula of mannitol is

(Multiple Choice)

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Question 164

Ammonia is reacted with sulfuric acid to form ammonium sulfate. Write the balanced reaction (omit state symbols (s), (l), (g), (aq), etc.).

(Multiple Choice)

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Question 165

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

(Multiple Choice)

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Question 166

A sample of unknown ore was analyzed and found to contain 12.7% Al, 19.7% N, and 67.6% O. What is the empirical formula of this ore

(Multiple Choice)

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Question 167

Calculate the average atomic mass of lithium using the following data: Isotope Abundance Mass 7.5\% 6.0151\nobreakspace 92.5\% 7.0160\nobreakspace

(Multiple Choice)

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Question 168

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 169

A chemistry student determined the empirical formula for tungsten oxide (W_xO_y). To do so, he heated tungsten with oxygen in a crucible. The data that he recorded are shown below: Weight of crucible 11.120 Weight of tungsten 8.820 Weight of crucible and product 22.998 What is the empirical formula of tungsten oxide

(Multiple Choice)

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Question 170

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

(Multiple Choice)

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Question 171

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

(Multiple Choice)

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Question 172

How many Cl atoms are in 0.0728 g of PCl₃

(Multiple Choice)

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Question 173

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

(Multiple Choice)

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Question 174

Which one of the following is an example of a balanced chemical reaction

(Multiple Choice)

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Question 175

The mineral hausmannite is a compound of ⁵⁵Mn and ¹⁶O. If 72% of the mass of hausmannite is due to manganese, what is the empirical formula of hausmannite

(Multiple Choice)

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Question 176

Calculate the molecular mass of menthol, C₁₀H₂₀O.

(Multiple Choice)

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Question 177

What is the theoretical yield of vanadium, in moles, that can be produced by the reaction of 1.0 mole of V₂O₅ with 4.0 moles of calcium based on the following chemical reaction V₂O₅(s) + 5Ca(l) $\rarr$ 2V(l) + 5CaO(s)

(Multiple Choice)

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Question 178

What is the theoretical yield of vanadium that can be produced by the reaction of 40.0 g of V₂O₅ with 40.0 g of calcium based on the following chemical reaction V₂O₅(s) + 5Ca(l) $\rarr$ 2V(l) + 5CaO(s)

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Question 179

How many sodium atoms are there in 6.0 g of Na₃N

(Multiple Choice)

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Question 180

Showing 161 - 180 of 194

Exam 3: Mass Relationships in Chemical Reactions

Balance the following chemical equation: C + Fe2O3 →\rarr→ Fe + CO

Aluminum hydroxide reacts with nitric acid to form aluminum nitrate and water. What mass of water can be formed by the reaction of 15.0 g of aluminum hydroxide with excess nitric acid

A 1.375 g sample of mannitol, a sugar found in seaweed, is burned completely in oxygen to give 1.993 g of carbon dioxide and 0.9519 g of water. The empirical formula of mannitol is

Ammonia is reacted with sulfuric acid to form ammonium sulfate. Write the balanced reaction (omit state symbols (s), (l), (g), (aq), etc.).

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

A sample of unknown ore was analyzed and found to contain 12.7% Al, 19.7% N, and 67.6% O. What is the empirical formula of this ore

Calculate the average atomic mass of lithium using the following data: Isotope Abundance Mass 7.5\% 6.0151\nobreakspace 92.5\% 7.0160\nobreakspace

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

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 equation below is properly balanced ___ PCl3(l) + ___ H2O(l) →\rarr→ ___ H3PO3(aq) + ___ HCl(aq)

How many Cl atoms are in 0.0728 g of PCl3

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

Which one of the following is an example of a balanced chemical reaction

The mineral hausmannite is a compound of 55Mn and 16O. If 72% of the mass of hausmannite is due to manganese, what is the empirical formula of hausmannite

Calculate the molecular mass of menthol, C10H20O.

What is the theoretical yield of vanadium, in moles, that can be produced by the reaction of 1.0 mole of V2O5 with 4.0 moles of calcium based on the following chemical reaction V2O5(s) + 5Ca(l) →\rarr→ 2V(l) + 5CaO(s)

What is the theoretical yield of vanadium that can be produced by the reaction of 40.0 g of V2O5 with 40.0 g of calcium based on the following chemical reaction V2O5(s) + 5Ca(l) →\rarr→ 2V(l) + 5CaO(s)

How many sodium atoms are there in 6.0 g of Na3N

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Balance the following chemical equation: C + Fe₂O₃ $\rarr$ Fe + CO

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

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

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 equation below is properly balanced _ PCl₃(l) + _ H₂O(l) $\rarr$ _ H₃PO₃(aq) + _ HCl(aq)

How many Cl atoms are in 0.0728 g of PCl₃

The mineral hausmannite is a compound of ⁵⁵Mn and ¹⁶O. If 72% of the mass of hausmannite is due to manganese, what is the empirical formula of hausmannite

Calculate the molecular mass of menthol, C₁₀H₂₀O.

What is the theoretical yield of vanadium, in moles, that can be produced by the reaction of 1.0 mole of V₂O₅ with 4.0 moles of calcium based on the following chemical reaction V₂O₅(s) + 5Ca(l) $\rarr$ 2V(l) + 5CaO(s)

What is the theoretical yield of vanadium that can be produced by the reaction of 40.0 g of V₂O₅ with 40.0 g of calcium based on the following chemical reaction V₂O₅(s) + 5Ca(l) $\rarr$ 2V(l) + 5CaO(s)

How many sodium atoms are there in 6.0 g of Na₃N