Question

9 grams of carbon and 1.5 grams of hydrogen combined with oxygen to make a compond whose mass is 22.5 and whose relative molecular mass is 60.determine the molecular formula

Answer 1

then grams oxygen is 22.5-9-1.5 grams O

Now calculate the moles of
C
H
O

Divide them all by the lowest denominator, the whole numbers you get is the empirical formula.

Find the mol mass of the empirical formula. divide that into 60. THat ratio is what each subscript needs to be multiplied by to get the molecular formula.

Post what you have, and we will critique it.