Question

What is the molecular formula of a compound that contains 6% hydrogen and 94% oxygen?

Answer 1

Answer:

CH2O

Explanation:

To find the ratio in moles you divide by the Ar of each element.

Using approximate values:

Ratio in grams C:H:O⇒

40:6.7:53.3

Ratio in moles ⇒

4012:6.71:53.316⇒

3.33:6.7:3.33

Dividing through by 3.33⇒

1:2:1

So the empirical formula is:

CH2O