Question

What is the percent composition (by mass) of carbon in C2H5NH2?

Answer 1

The percent composition of carbon in C2H5NH2 is 53.29%.

Step-by-step explanation:

The percent composition (by mass) of carbon in C2H5NH2 can be calculated by considering the molar mass and mass of carbon in the compound.

C2H5NH2 has a molar mass of 45.08 g/mol. In this compound, there are 2 carbon atoms each with a molar mass of 12.01 g/mol. Therefore, the total mass of carbon in C2H5NH2 is 24.02 g/mol.

To calculate the percent composition of carbon, divide the mass of carbon (24.02 g/mol) by the molar mass of the compound (45.08 g/mol) and multiply by 100.

Percent composition of carbon in C2H5NH2 = (24.02 g/mol / 45.08 g/mol) * 100 = 53.29%

Answer 2

53.3%

Step-by-step explanation:

C:12 H:1 N:14

Mr = 2(12)+5(1)+14+2 =45

%C = Mass of carbon divides by molecular mass times 100

2(12) divides by 45 times 100

=53.3%