Answer:
C: 61.0%, H: 15.3%, N: 23.7%
Explanation:
We can calculate the percent by mass of each element using the following expression.
%Element = (mass of the element/mass of the compound) × 100%
Carbon
%C = (7.34 g/12.04 g) × 100% = 61.0%
Hydrogen
%H = (1.85 g/12.04 g) × 100% = 15.3%
Nitrogen
%N = (2.85 g/12.04 g) × 100% = 23.7%
The percent composition of this compound is C: 61.0%, H: 15.3%, N: 23.7%.
