   Chapter 2, Problem 69PS

Chapter
Section
Textbook Problem

Calculate the molar mass of each of the following compounds:(a) Fe2O3, iron(III) oxide(b) BCI3, boron trichloride(c) C6H8O6, ascorbic acid (vitamin C)

(a)

Interpretation Introduction

Interpretation:

For the given molecules, the molar masses are needed to be calculated.

Concept introduction:

• Molar mass of a molecule can be calculated from its molecular formula by taking the sum of atomic masses of all the elements present in it.
Explanation

The molecular formula of iron (III) oxide is Fe2O3, so the molar mass of iron (III) oxide is,

2×55.845g(Fe)+

(b)

Interpretation Introduction

Interpretation:

For the given molecules, the molar masses are needed to be calculated.

Concept introduction:

• Molar mass of a molecule can be calculated from its molecular formula by taking the sum of atomic masses of all the elements present in it.

(c)

Interpretation Introduction

Interpretation:

For the given molecules, the molar masses are needed to be calculated.

Concept introduction:

• Molar mass of a molecule can be calculated from its molecular formula by taking the sum of atomic masses of all the elements present in it.

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