   Chapter 21.11, Problem 2.2ACP

Chapter
Section
Textbook Problem

Calculate the mass of hydrogen in 1.00 kg of ammonia borane. The density of ammonia borane is 0.780 g/cm3.

Interpretation Introduction

Interpretation:

The mass of hydrogen in 1.00 kg of ammonia borane has to be calculated.

Concept introduction:

The formula for ammonia borane is H3NBH3. It is an important boron-nitrogen hydride compound and is a source of hydrogen fuel. The other name for ammonia borane is borazane.

It is a colorless white solid and has an atomic mass of 30.865 g.

Explanation

The mass of hydrogen in 1.00 kg of ammonia borane is calculated below.

Given:

The density of ammonia borane is 0.780 g/cm3.

The formula for ammonia borane is H3NBH3. It is attached to six hydrogen atoms.

The molar mass of ammonia borane is 30.865 g.

The atomic mass of six hydrogen atom is 6.047 g.

Thus, the percent of the mass of hydrogen in ammonia borane is:

Percent H= 6.047g30.865g=19

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