Chemistry In Focus
Chemistry In Focus
6th Edition
ISBN: 9781305084476
Author: Tro, Nivaldo J., Neu, Don.
Publisher: Cengage Learning
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Chapter 4, Problem 50E
Interpretation Introduction

Interpretation:

The chemical equations are to be balanced for the given reactions.

Concept introduction:

A chemical equation is a symbolic depiction of a chemical reaction that 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 a molecule, but not their structural arrangement.

Expert Solution & Answer
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Answer to Problem 50E

Solution: The balanced chemical equation is given as follows:

3PbO+2NH33Pb+N2+3H2O

Mg3N2+6H2O3Mg(OH)2+2NH3

C3H8+5O23CO2+4H2O

Explanation of Solution

a) PbO+NH3Pb+N2+H2O

H atom is balanced by multiplying the coefficient 2 with NH3 and the coefficient 3 with H2O as follows:

PbO+2NH3Pb+N2+3H2O

In the next step, O atom is balanced by multiplying the coefficient 3 with PbO and further, Pb atom is balanced by multiplying the coefficient 3 with Pb as follows:

3PbO+2NH33Pb+N2+3H2O

b) Mg3N2+H2OMg(OH)2+NH3

Mg atom is balanced by multiplying the coefficient 3 with Mg(OH)2 as follows:

Mg3N2+H2O3Mg(OH)2+NH3

In the next step, O atom is balanced by multiplying the coefficient 6 with H2O as follows:

Mg3N2+6H2O3Mg(OH)2+NH3

Now, in the final step, H atom is balanced by multiplying the coefficient 2 with NH3 as follows:

Mg3N2+6H2O3Mg(OH)2+2NH3

c) C3H8+O2CO2+H2O

H atom is balanced by multiplying the coefficient 4 with H2O as follows:

C3H8+O2CO2+4H2O

In the next step, C atom is balanced by multiplying the coefficient 3 with CO2 as follows:

C3H8+O23CO2+4H2O

Now, in the final step, O atom is balanced by multiplying the coefficient 5 with O2 as follows:

C3H8+5O23CO2+4H2O

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Chapter 4 Solutions

Chemistry In Focus

Ch. 4 - Using Chemical Equation Coefficients as Conversion...Ch. 4 - Classify each compound as ionic or molecular. LiBr...Ch. 4 - Prob. 2SCCh. 4 - What is wrong with the following compound names?...Ch. 4 - Prob. 4SCCh. 4 - The coefficients in the chemical reaction 2A+3B...Ch. 4 - Prob. 6SCCh. 4 - In Chapter 3, we learned that all matter is...Ch. 4 - Name some common everyday compounds.Ch. 4 - Prob. 3ECh. 4 - Prob. 4ECh. 4 - Prob. 5ECh. 4 - Prob. 6ECh. 4 - Prob. 7ECh. 4 - What is the difference between a common name for a...Ch. 4 - Prob. 9ECh. 4 - Prob. 10ECh. 4 - Prob. 11ECh. 4 - Prob. 12ECh. 4 - Prob. 13ECh. 4 - Prob. 14ECh. 4 - Why must chemical equations be balanced?Ch. 4 - Explain the numerical relationships inherent in a...Ch. 4 - Chemical Formulas Determine the number of each...Ch. 4 - Determine the number of each type of atom in each...Ch. 4 - Classify each compound as ionic or molecular:...Ch. 4 - Classify each compound as ionic or molecular:...Ch. 4 - Prob. 21ECh. 4 - Prob. 22ECh. 4 - Prob. 23ECh. 4 - Prob. 24ECh. 4 - Prob. 25ECh. 4 - Prob. 26ECh. 4 - Give a chemical formula for each compound: a....Ch. 4 - Give a chemical formula for each compound: a....Ch. 4 - Prob. 29ECh. 4 - Calculate the formula mass for each compound:...Ch. 4 - The formula mass of an unknown compound containing...Ch. 4 - The formula mass of an unknown compound containing...Ch. 4 - Mole Conversions How many moles of CO2 are...Ch. 4 - What is the mass of 2.55 moles of water?Ch. 4 - The active ingredient in aspirin is...Ch. 4 - The active ingredient in Tylenol is acetaminophen...Ch. 4 - Calculate the number of water molecules (H2O) in...Ch. 4 - Acetone (C3H6O) is used as nail polish remover. If...Ch. 4 - Determine the number of sugar molecules in 7.5 g...Ch. 4 - One drop of water from a medicine dropper has a...Ch. 4 - How many chlorine atoms are in each of the...Ch. 4 - How many hydrogen atoms are in each of the...Ch. 4 - Prob. 43ECh. 4 - Find the number of moles of nitrogen in each of...Ch. 4 - The U.S. Food and Drug Administration recommends...Ch. 4 - The scientific consensus indicates that adults...Ch. 4 - Determine the mass of iron (in kilograms)...Ch. 4 - Determine the mass of carbon (in kilograms)...Ch. 4 - Balancing Chemical Equations Balance each chemical...Ch. 4 - Prob. 50ECh. 4 - Prob. 51ECh. 4 - Prob. 52ECh. 4 - Water can be synthesized according to the...Ch. 4 - Billions of pounds of urea, CO(NH2)2, are produced...Ch. 4 - Prob. 55ECh. 4 - Prob. 56ECh. 4 - Prob. 57ECh. 4 - Prob. 58ECh. 4 - Prob. 61ECh. 4 - For each space-filling molecular model, write a...Ch. 4 - For each chemical reaction, draw in the missing...
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