   Chapter 2, Problem 72PS

Chapter
Section
Textbook Problem

Calculate the molar mass of each hydrated compound. Note that the water of hydration is included in the molar mass. (See page 85.)(a) H2C2O4 · 2 H2O(b) MgSO4 · 7 H2O, Epsom salt

(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 H2C2O4.2H2O, so the molar mass of compound is,

2×1.008g/mol(H)+2×12.01g/mol(C)+4×16g/mol(O)

(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.

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