   # Calculate the formula mass for each compound: a . NaCl ( table salt ) b . CH 4 ( natural gas ) c . NH 4 Cl d . C 12 H 22 O 11 ( sugar ) ### Chemistry In Focus

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

#### Solutions

Chapter
Section ### Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692
Chapter 4, Problem 30E
Textbook Problem
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## Calculate the formula mass for each compound: a .  NaCl  ( table salt ) b .  CH 4 ( natural gas ) c .  NH 4 Cl d .  C 12 H 22 O 11 ( sugar )

Interpretation Introduction

Interpretation:

The formula mass for each of the given compounds is to be calculated.

Concept Introduction:

The characteristic mass of a compound is considered to be the formula mass of the compound, which is obtained by adding the atomic masses of all atoms present in the formula unit of the compound.

A set of chemical symbols represents the elements that exist in a compound.

### Explanation of Solution

a) NaCl(tablesalt)

The formula mass of NaCl(tablesalt) is calculated by adding the atomic masses of sodium and chlorine atoms, as follows:

formula mass of NaCl=(22.98amu+35.45amu)=58.43amu

Therefore, the formula mass of NaCl is 58.43 amu.

b) CH4(naturalgas)

The formula mass of CH4(naturalgas) is calculated by adding the atomic masses of carbon and hydrogen atoms, as follows:

formula mass of CH4=(12.01amu+4(1.01amu))=(12.01amu+4.04amu)=16.05amu

Therefore, the formula mass of CH4 is 16.05 amu.

c) NH4Cl

The formula mass of NH4Cl is calculated by adding the atomic masses of nitrogen, hydrogen and chlorine atoms, as follows:

formula mass of NH4Cl=(14.01amu+4(1

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