Question

Compound has a molar mass of and the following composition: element mass % carbon 58.77% hydrogen 13.81% nitrogen 27.42% Write the molecular formula of .

Answer 1

Answer: C5H14N2

Explanation:

The element mass are:

C = 58.77 g

H = 13.81 g

N = 27.42 g

To get their moles, we have to divide by the molar mass which will be:

C: 58.77 / 12.01 = 4.8934

H: 13.81 / 1.008 = 13.7004

N: 27.42 / 14.01 = 1.9572

We then divide by the smallest mole which will be:

C: 4.8934 / 1.9572 = 2.5

H: 13.7004 / 1.9572 = 7

N: 1.9572 / 1.9572 = 1

We then multiply by 2 so that we can get whole number ratio:

C: 2.5 × 2 = 5

H: 7 × 2 = 14

N: 1 × 2 = 2

Therefore, the empirical formula will be = C5H14N2