Question

116 g of a substance upon dissociation reaction, yields 7.5 g of hydrogen, 60 g of oxygen and 48.5 g of carbon. Given that the atomic masses of H, O and C are 1, 16 and 12, respectively. The data agrees with how many formulae of the following? _______
A. $CH_3COOH$
B. $HCHO$
C. $CH_3OOCH_3$
D. $CH_3CHO$

Answer 1

Element	Mass%	Moles%	Relative moles
H	6.46	6.46	2
O	51.72	3.23	1
C	41.81	3.48	1

$∴$ Empirical formula = $COH_2$

The empirical formula goes with acetic acid $CH_3COOH$ and formaldehyde $HCHO.$

Thus data agrees with $2$ formulae.