Mixed Stoichiometry Practice

Authored by Kelly Allen

Chemistry

9th Grade

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MULTIPLE CHOICE QUESTION

3 mins • 1 pt

For the reaction represented by the equation Cl₂ + 2KBr → Br₂ + 2KCl, how many grams of potassium chloride can be produced from 356 grams potassium bromide?

749 g

225 g

479 g

814 g

Tags

NGSS.HS-PS1-7

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Use the equation 2 Al + 3 Cl₂ ---> 2 AlCl₃. If 2 moles of aluminum and 2 moles of chlorine are reacted, identify the limiting reactant.

AlCl3

Cl2

Tags

NGSS.HS-PS1-7

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

CH₄ + 2H₂O --> CO₂+ 4H₂
What is the limiting reactant when 20 g CH₄react with 15 g H₂O?

CH₄

H₂O

CO₂

H₂

Tags

NGSS.HS-PS1-7

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Nitric acid can be neutralized by any base to form a salt and water, as in the following equation:

Mg(OH)₂ + 2 HNO₃ → Mg(NO₃)₂ + 2 H₂O

How much magnesium nitrate salt will be formed by the reaction of 250. g magnesium hydroxide with 250. g nitric acid?

294 g

636 g

147 g

318 g

Tags

NGSS.HS-PS1-7

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Tetraphosphorus decoxide combines with water to form phosphoric acid in the following unbalanced chemical equation:
P₄O₁₀ + H₂O → H₃PO₄
In order to form 100.0 g phosphoric acid, how much tetraphosphorus decoxide will you need?

289.7 g

138.1 g

262.6 g

72.42 g

Tags

NGSS.HS-PS1-7

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

2Fe₂O₃ + C → Fe + 3CO₂
You react 28.0 grams of carbon with excess Fe₂O₃. You find the actual yield to be 181.2 grams of CO₂. What is the percent yield of CO₂?

58.83%

308%

6435%

15.5

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

P₄+ 6Cl₂--> 4PCl₃The reaction of 75.0 g P₄ with excess chlorine gas produces 110 g PCl₃in the lab. Calculate the percent yield for the reaction.

78%

64%

27%

33%

Tags

NGSS.HS-PS1-7

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Mixed Stoichiometry Practice

For the reaction represented by the equation Cl₂ + 2KBr → Br₂ + 2KCl, how many grams of potassium chloride can be produced from 356 grams potassium bromide?

Use the equation 2 Al + 3 Cl₂ ---> 2 AlCl₃. If 2 moles of aluminum and 2 moles of chlorine are reacted, identify the limiting reactant.

CH₄ + 2H₂O --> CO₂+ 4H₂
What is the limiting reactant when 20 g CH₄react with 15 g H₂O?

Nitric acid can be neutralized by any base to form a salt and water, as in the following equation:

Mg(OH)₂ + 2 HNO₃ → Mg(NO₃)₂ + 2 H₂O

How much magnesium nitrate salt will be formed by the reaction of 250. g magnesium hydroxide with 250. g nitric acid?

Tetraphosphorus decoxide combines with water to form phosphoric acid in the following unbalanced chemical equation:
P₄O₁₀ + H₂O → H₃PO₄
In order to form 100.0 g phosphoric acid, how much tetraphosphorus decoxide will you need?

2Fe₂O₃ + C → Fe + 3CO₂
You react 28.0 grams of carbon with excess Fe₂O₃. You find the actual yield to be 181.2 grams of CO₂. What is the percent yield of CO₂?

P₄+ 6Cl₂--> 4PCl₃The reaction of 75.0 g P₄ with excess chlorine gas produces 110 g PCl₃in the lab. Calculate the percent yield for the reaction.

How many grams of nitric acid, HNO₃, can be prepared from the reaction of 138 g of NO₂ with 54.0 g H₂O according to the equation below?
3NO₂ + H₂O → 2HNO₃ + NO

3CaCO₃ + 2FePO₄ --> Ca₃(PO₄)₂ + Fe₂(CO₃)₃

Assuming we start with 40.5 g of CaCO₃ and 45.0 g of FePO₄, identify the limiting reactant.

B₂H₆ + 3O₂ -->2 HBO₂ + 2 H₂O
What mass of O₂ will be needed to react with 36.1 g of B₂H₆?

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Mixed Stoichiometry Practice

For the reaction represented by the equation Cl2 + 2KBr → Br2 + 2KCl, how many grams of potassium chloride can be produced from 356 grams potassium bromide?

Use the equation 2 Al + 3 Cl2 ---> 2 AlCl3. If 2 moles of aluminum and 2 moles of chlorine are reacted, identify the limiting reactant.

CH4 + 2H2O --> CO2 + 4H2What is the limiting reactant when 20 g CH4 react with 15 g H2O?

Nitric acid can be neutralized by any base to form a salt and water, as in the following equation:Mg(OH)2 + 2 HNO3 → Mg(NO3)2 + 2 H­2OHow much magnesium nitrate salt will be formed by the reaction of 250. g magnesium hydroxide with 250. g nitric acid?

Tetraphosphorus decoxide combines with water to form phosphoric acid in the following unbalanced chemical equation:P4O10 + H2O → H3PO4In order to form 100.0 g phosphoric acid, how much tetraphosphorus decoxide will you need?

2Fe2O3 + C → Fe + 3CO2You react 28.0 grams of carbon with excess Fe2O3. You find the actual yield to be 181.2 grams of CO2. What is the percent yield of CO2?

P4 + 6Cl2 --> 4PCl3 The reaction of 75.0 g P4 with excess chlorine gas produces 110 g PCl3 in the lab. Calculate the percent yield for the reaction.

How many grams of nitric acid, HNO3, can be prepared from the reaction of 138 g of NO2 with 54.0 g H2O according to the equation below? 3NO2 + H2O → 2HNO3 + NO

3CaCO3 + 2FePO4 --> Ca3(PO4)2 + Fe2(CO3)3Assuming we start with 40.5 g of CaCO3 and 45.0 g of FePO4, identify the limiting reactant.

B2H6 + 3O2 -->2 HBO2 + 2 H2O What mass of O2 will be needed to react with 36.1 g of B2H6?

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For the reaction represented by the equation Cl₂ + 2KBr → Br₂ + 2KCl, how many grams of potassium chloride can be produced from 356 grams potassium bromide?

Use the equation 2 Al + 3 Cl₂ ---> 2 AlCl₃. If 2 moles of aluminum and 2 moles of chlorine are reacted, identify the limiting reactant.

CH₄ + 2H₂O --> CO₂+ 4H₂
What is the limiting reactant when 20 g CH₄react with 15 g H₂O?

Nitric acid can be neutralized by any base to form a salt and water, as in the following equation:

Mg(OH)₂ + 2 HNO₃ → Mg(NO₃)₂ + 2 H₂O

How much magnesium nitrate salt will be formed by the reaction of 250. g magnesium hydroxide with 250. g nitric acid?

Tetraphosphorus decoxide combines with water to form phosphoric acid in the following unbalanced chemical equation:
P₄O₁₀ + H₂O → H₃PO₄
In order to form 100.0 g phosphoric acid, how much tetraphosphorus decoxide will you need?

2Fe₂O₃ + C → Fe + 3CO₂
You react 28.0 grams of carbon with excess Fe₂O₃. You find the actual yield to be 181.2 grams of CO₂. What is the percent yield of CO₂?

P₄+ 6Cl₂--> 4PCl₃The reaction of 75.0 g P₄ with excess chlorine gas produces 110 g PCl₃in the lab. Calculate the percent yield for the reaction.

How many grams of nitric acid, HNO₃, can be prepared from the reaction of 138 g of NO₂ with 54.0 g H₂O according to the equation below?
3NO₂ + H₂O → 2HNO₃ + NO

3CaCO₃ + 2FePO₄ --> Ca₃(PO₄)₂ + Fe₂(CO₃)₃

Assuming we start with 40.5 g of CaCO₃ and 45.0 g of FePO₄, identify the limiting reactant.

B₂H₆ + 3O₂ -->2 HBO₂ + 2 H₂O
What mass of O₂ will be needed to react with 36.1 g of B₂H₆?