The empirical formula of a compound is CH2O and its molecular mass is 120. The molecular formula of the compound is

Question

The empirical formula of a compound is CH2O and its molecular mass is 120. The molecular formula of the compound is (A) C2H4O2 (B) C3H6O3 (C) C4H8O4 (D) CH2O

Tardigrade Admin · Accepted Answer

E.F. mass =12+2×1+16=30 Mol. mass = 120 n=( textMol.mass/ textE.F. mass) =(120/30)=4 ∴ Mol. formula =(CH2O)4 =C4H8O4

Q. The empirical formula of a compound is $C H_{2} O$ and its molecular mass is 120. The molecular formula of the compound is

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

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

$C_{4} H_{8} O_{4}$

$C H_{2} O$

E.F. mass $= 12 + 2 \times 1 + 16 = 30$
Mol. mass $= 120$
$n = \frac{Mol.mass}{E.F. mass}$
$= \frac{120}{30} = 4$
$∴$ Mol. formula $= (C H_{2} O)_{4}$
$= C_{4} H_{8} O_{4}$

Q. The empirical formula of a compound is CH2​O and its molecular mass is 120. The molecular formula of the compound is

C2​H4​O2​

C3​H6​O3​

C4​H8​O4​

CH2​O