a.
Interpretation: The mass of hydrogen in 350 g 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.
a.
Answer to Problem 38SP
The mass of hydrogen in 350 g of ethane is
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
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
The conversion factor to convert the mass of
Now, to calculate the mass of
, the required conversion factor is:
Hence, the mass of hydrogen in 350 g of ethane is
b.
Interpretation: The mass of hydrogen in 20.2 g 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.
b.
Answer to Problem 38SP
The mass of hydrogen in 20.2 g of sodium hydrogen sulfate is
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
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
The conversion factor to convert the mass of
Now, to calculate the mass of
Hence, the mass of hydrogen in 20.2 g of sodium hydrogen sulfate is
Chapter 10 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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