Concept explainers
(a)
The percentage by mass of each element in salt,
NaCl
.
(a)
Answer to Problem 7E
Explanation of Solution
The percentage by mass of an element in a compound is defined as the percentage of total mass of that element present in the total mass or formula mass of the compound. Mass percent of any element B in compound AB is given as,
The formula mass of
Substitute
The percentage by mass of sodium
Substitute
The percentage by mass of chlorine
Substitute
Conclusion:
Therefore, the percentage by mass of sodium
(b)
The percentage by mass of each element in sucrose,
C 12 H 22 O 11
.
(b)
Answer to Problem 7E
Explanation of Solution
The percentage by mass of an element in a compound is defined as the percentage of total mass of that element present in the total mass or formula mass of the compound. Mass percent of any element B in compound AB is given as,
Atomic mass of carbon
Atomic mass of hydrogen
Atomic mass of oxygen
The chemical formula of sucrose is
The formula mass of sucrose,
Substitute
The total mass of carbon
Substitute
The total mass of hydrogen
Substitute
The total mass of oxygen
Substitute
The percentage by mass of carbon
Substitute
The percentage by mass of hydrogen
Substitute
The percentage by mass of oxygen
Substitute
Conclusion:
Therefore, the percentage by mass of carbon
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Chapter 12 Solutions
An Introduction to Physical Science