What is the percentage by mass of carbon in CO? Give your answer to two significant figures.

Question

Hint: The relative formula mass (M₁) of CO = 28, the A, C = 12 and the A, O = 16.
Enter a number

Answer 1

The relative formula mass (M₁) of CO = 28

So, the molar mass of CO is 28g/mol.

In CO, there is 1 carbon atom with a relative atomic mass of 12.

Therefore, the mass percentage of carbon in CO can be calculated as follows:

(12 g/mol / 28 g/mol) * 100% ≈ 42.86%

Rounded to two significant figures, the percentage by mass of carbon in CO is 43%.