
To calculate:
Percent composition of following compounds:
a)
b)
c)
d)

Answer to Problem 7.47QA
Solution:
The Percent composition of following compounds are:
a)
b)
c)
d)
Explanation of Solution
1) Concept:
We are asked to calculate the percent composition of the given four compounds. The chemical formula of each of the given compounds gives us the stoichiometry between the compound and its corresponding elements. That is, for example, one mole of
2) Formula:
3) Given:
Molecular formulas for four compounds are:
(a)
(b)
(c)
(d)
4) Calculations:
Calculating molar mass of each of the given compounds as follows:
(a) Calculating mass of
Molar mass of
Calculating percent composition of
(b) Calculating mass of
Molar mass of
Calculating percent composition of
(c) Calculating mass of
Molar mass of
Calculating percent composition of
(d) Calculating mass of
Molar mass of
Calculating percent composition of
Conclusion:
We can find the percent composition of each element present in a given compound by using atomic weights and mole ratio.
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Chapter 7 Solutions
Chemistry: An Atoms-Focused Approach
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