Give the mass percent of carbon in C₁₄H₁₉NO₂.

Question

Quizplus · Accepted Answer

To calculate the mass percent of carbon, we need to find the mass of carbon and the total mass of the compound. 
Number of carbon atoms = 2 
Molar mass of carbon = 12.01 g/mol 
Total molar mass of the compound = (12.01x2) + 32.06 + 1.01 + 1.01 + 32.06 + 1.01 + 12.01 + 1.01 + 1.01 + 19.00 + 32.06 + 1.01 + 12.01 + 1.01 = 170.29 g/mol

Mass of carbon = (2x12.01) = 24.02 g 
Mass percent of carbon = (mass of carbon/total mass of the compound) x 100% 
= (24.02/170.29) x 100% 
= 14.1%

Therefore, the best choice is B as it gives the closest value to our calculated value.

Give the Mass Percent of Carbon in C14H19NO2

Give the Mass Percent of Carbon in C₁₄H₁₉NO₂