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Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692

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BuyFindarrow_forward

Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692
Chapter 4, Problem 44E
Textbook Problem
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Find the number of moles of nitrogen in each of the following:

a . 1 .22 mol N 2 H 4 b . 0 .67 mol N 2 O c . 0 .67 mol NO d . 37 .1 g N 2

Interpretation Introduction

Interpretation:

The number of moles of nitrogen is to be determined in the given molecules.

Concept Introduction:

The characteristic mass of a compound is considered as the formula mass of the compound, which is obtained by adding the atomic masses of all the atoms.

A conversion factor is considered a numerical ratio in order to change one unit into another.

A chemical formula represents the precise number of atoms in a molecule, but not their structural arrangement.

Explanation of Solution

a) 1.22mol N2H4

The equivalence is obtained between moles of N2H4 and moles of nitrogen with the help of the chemical formula as follows:

2mol N1mol N2H4

In order to obtain moles of nitrogen, the conversion factor proceeds as follows:

(1.22mol N2H4)×(2mol N1mol N2H4)=2.44mol N

Therefore, the moles of nitrogen are 2.44 mol.

b) 0.67mol N2O

The equivalence is obtained between moles of N2O and moles of nitrogen with the help of the chemical formula as follows:

2mol N1mol N2O

In order to obtain moles of nitrogen, the conversion factor proceeds as follows:

(0.67mol N2O)×(2mol N1mol N2O)=1.34mol N

Therefore, the moles of nitrogen are 1.3 mol.

c) 0.67mol NO

The equivalence is obtained between moles of NO and moles of nitrogen with the help of the chemical formula as follows:

1mol N1mol NO

In order to obtain moles of nitrogen, the conversion factor proceeds as follows:

(0

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Chemistry In Focus
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