Chemistry In Focus
Chemistry In Focus
7th Edition
ISBN: 9781337399692
Author: Tro, Nivaldo J.
Publisher: Cengage Learning,
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Chapter 4, Problem 63E

For each chemical reaction, draw in the missing molecules necessary to balance their equations. Carbon atoms are black, hydrogen atoms are white, oxygen atoms are red, and nitrogen atoms are blue.

Chapter 4, Problem 63E, For each chemical reaction, draw in the missing molecules necessary to balance their equations.

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Interpretation Introduction

Interpretation:

The chemical reactions are to be balanced for the given molecular model reactions, where carbon atoms are black, hydrogen atoms are white, oxygen atoms are red, and nitrogen atoms are blue.

Concept Introduction:

A chemical equation is considered to be the symbolic depiction of a chemical reaction, which contains symbols and formula.

In a chemical reaction, the starting substances on the left side are known as reactants, while the substances on the right side are known as products.

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

The molecular model represents the molecules in a three-dimensional configuration.

Answer to Problem 63E

Solution: The chemical formulas are represented as follows: a) C2H4+3O22CO2+2H2O b) N2+3H22NH3 c) 2NO+2CON2+2CO2 d) 4NO2+O2+2H2O4HNO3

Explanation of Solution

a)

In the given molecular model, the reaction can be represented in a chemical reaction as follows:

C2H4+O2CO2+H2O

C atom is balanced by multiplying with a coefficient 2 in CO2 as follows:

C2H4+O22CO2+H2O

In the next step, the O atom is balanced by the multiplying with a coefficient 3 in O2 as follows:

C2H4+3O22CO2+H2O

Now, in the final step, the H atom is balanced by the multiplying with a coefficient 2 in H2O as follows:

C2H4+3O22CO2+2H2O

b)

In the given molecular model, the reaction can be represented in a chemical reaction as follows:

N2+H2NH3

N atom is balanced by multiplying with a coefficient 2 in NH3 as follows:

N2+H22NH3

In the next step, the H atom is balanced by the multiplying with a coefficient 3 in H2 as follows:

N2+3H22NH3

c)

In the given molecular model, the reaction can be represented in a chemical reaction as follows:

NO+CON2+CO2

N atom is balanced by multiplying with a coefficient 2 in NO as follows:

2NO+CON2+CO2

In next step, the O atom is balanced by multiplying with a coefficient 2 in CO2 of product part as follows:

2NO+CON2+2CO2

Now, in the final step, the C atom is balanced by multiplying with a coefficient 2 in CO of reactant part as follows:

2NO+2CON2+2CO2

d)

In the given molecular model, the reaction can be represented in a chemical reaction as follows:

NO2+O2+H2OHNO3

H atom is balanced by multiplying with a coefficient 4 in HNO3 of product part while coefficient 2 in H2O as follows:

NO2+O2+2H2O+4HNO3

In the next step, O and N are balanced by multiplying with a coefficient 4 in NO2 as follows:

4NO2+O2+2H2O4HNO3

Now, in the final step, the H atom is balanced by the multiplying with a coefficient 2 in H2O as follows:

4NO2+O22H2O+4HNO3

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Chapter 4 Solutions

Chemistry In Focus

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