Chapter 9, Problem 75CP

(a)

Interpretation Introduction

Interpretation : To calculate the moles O₂.

Concept Introduction : A balance chemical equation provide information about number of moles of products and reactants with the help of mole concept. The actual yield of the product is the amount of product which is formed at the end of reaction experimentally whereas theoretical yield represents the amount of product calculated by expecting that 100 % of reactant changes to product. The percent yield can be shown as:

  $\text{Percent yield = }\frac{\text{Actual yield}}{\text{Theoretical yield}}\text{x 100}$

(b)

Interpretation Introduction

Interpretation : Mass of Cr₂O₃ produced when 24.8 g of Cr reacts should be determined.

Concept Introduction : A balance chemical equation provide information about number of moles of products and reactants with the help of mole concept. The actual yield of the product is the amount of product which is formed at the end of reaction experimentally whereas theoretical yield represents the amount of product calculated by expecting that 100 % of reactant changes to product. The percent yield can be shown as:

  $\text{Percent yield = }\frac{\text{Actual yield}}{\text{Theoretical yield}}\text{x 100}$

(c)

Interpretation Introduction

Interpretation : Mass of Cr₂O₃ formed when 26.0 g of Cr reacts with 8.00 g of O₂ should be determined.

Concept Introduction : A balance chemical equation provide information about number of moles of products and reactants with the help of mole concept. The actual yield of the product is the amount of product which is formed at the end of reaction experimentally whereas theoretical yield represents the amount of product calculated by expecting that 100 % of reactant changes to product. The percent yield can be shown as:

  $\text{Percent yield = }\frac{\text{Actual yield}}{\text{Theoretical yield}}\text{x 100}$

(d)

Interpretation Introduction

Interpretation : The percent yield of the reaction should be determined.

Concept Introduction : A balance chemical equation provide information about number of moles of products and reactants with the help of mole concept. The actual yield of the product is the amount of product which is formed at the end of reaction experimentally whereas theoretical yield represents the amount of product calculated by expecting that 100 % of reactant changes to product. The percent yield can be shown as:

  $\text{Percent yield = }\frac{\text{Actual yield}}{\text{Theoretical yield}}\text{x 100}$