Question

5-Analysis of a 12.04-g sample of a liquid compound composed of carbon, hydrogen, and nitrogen showed it to contain 7.34 g C, 1.85 g H, and 2.85 g N. What is the percent composition of this compound

Answer 1

%C = 60.9%; %H = 15.4%; %N = 23.7%

Step-by-step explanation:

Step 1: Given data

• Mass of the sample (m): 12.04 g

• Mass of Carbon (mC): 7.34 g

• Mass of Hydrogen (mH): 1.85 g

• Mass of Nitrogen (mN): 2.85 g

Step 2: Calculate the percent composition of this compound

To calculate the percent by mass of any element (E), we will use the following expression.

%E = mE/m × 100%

%C = 7.34 g/12.04 g × 100% = 60.9%

%H = 1.85 g/12.04 g × 100% = 15.4%

%N = 2.85 g/12.04 g × 100% = 23.7%