A compound with empirical formula CH2O has a vapour density of 30. Its molecular formula is

Question

A compound with empirical formula CH2O has a vapour density of 30. Its molecular formula is (A) C6H12O6 (B) C2H4O2 (C) C2H2O2 (D) C3H6O3

Tardigrade Admin · Accepted Answer

Molecular mass = 2 Ã V.D. = 2 Ã 30 = 60 n = (Molecular mass/Empirical formula mass) = (60/30) = 2 Molecular formula = n Ã empirical formula = 2 Ã CH2O = C2H4O2

Q. A compound with empirical formula $C H_{2} O$ has a vapour density of 30. Its molecular formula is

$C_{6} H_{12} O_{6}$

$C_{2} H_{4} O_{2}$

$C_{2} H_{2} O_{2}$

$C_{3} H_{6} O_{3}$

Molecular mass $= 2 \times V . D . = 2 \times 30 = 60$
$n = \frac{M o l ec u l a r ma ss}{E m p i r i c a l f or m u l a ma ss} = \frac{60}{30} = 2$
Molecular formula $= n \times$ empirical formula
$= 2 \times C H_{2} O = C_{2} H_{4} O_{2}$

Q. A compound with empirical formula CH2​O has a vapour density of 30. Its molecular formula is

C6​H12​O6​

C2​H4​O2​

C2​H2​O2​

C3​H6​O3​