Interpretation: The percent composition of ethane should be calculated.
Concept Introduction: The percent composition represents the relative amount of the elements in a compound. It is represented as the percent by mass of each element in the compound.
Answer to Problem 36SP
The percent composition of C is 80.0% and H is 20.0% in ethane.
Explanation of Solution
The percent by mass of each element in the compound represents the percent composition as:
The percent composition can be determined by the molecular formula of the compound as well as using the relation:
The molar mass of
is determined as:
The moles of C and H are converted to grams of C and H as:
The mass of 1 mol of
Now, determining the percent composition of
Now, determining the percent composition of
Hence, the percent composition of C is 80.0% and H is 20.0% in ethane.
Interpretation: The percent composition of sodium hydrogen sulfate should be calculated.
Concept Introduction: The percent composition represents the relative amount of the elements in a compound. It is represented as the percent by mass of each element in the compound.
Answer to Problem 36SP
The percent composition of Na is 19.2.0%, H is 0.83%, S is 26.7% and O is 53.3% in sodium hydrogen sulfate.
Explanation of Solution
The percent by mass of each element in the compound represents the percent composition as:
The percent composition can be determined by the molecular formula of the compound as well as using the relation:
The molar mass of
is determined as:
The moles of Na, H, S, and O are converted to grams of Na, H, S, and O as:
The mass of 1 mol of
Now, determining the percent composition of
Now, determining the percent composition of
Now, determining the percent composition of
Now, determining the percent composition of
Hence, the percent composition of Na is 19.2.0%, H is 0.83%, S is 26.7% and O is 53.3% in sodium hydrogen sulfate.
Chapter 10 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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