Question

$116g$ of a substance upon dissociation reaction, yields $7.5g$ of hydrogen, $60g$ of oxygen and $48.5g$ 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) $C{H}_{3}COOH$
(B) $HCHO$
(C) $C{H}_{3}OOC{H}_3$
(D) $C{H}_{3}CHO$

Answer 1

Answer: 2

$\%H=\frac{7.5}{116}\times 100=6.5$
$\%O=\frac{60}{116}\times 100=51.7$
$\%C=\frac{48.5}{116}\times 100=41.8$
Relative atomicities $=H\Rightarrow 6.5$
$O\Rightarrow \frac{51.7}{16}=3.25$
$C\Rightarrow \frac{41.8}{12}=3.5$
Emperically formula is approx.. $C{H}_{2}O$
(A) $C_2{H}_4{O}_2$ (B) $C{H}_{2}O$ relate to this formula.