A compound has the molecular formula X4 O 6 . If 10 g of X 4 O 6 has 5.72 g X, then calculate atomic mass of X.

Question

A compound has the molecular formula X4 O 6 . If 10 g of X 4 O 6 has 5.72 g X, then calculate atomic mass of X. (A) 32 amu (B) 64 amu (C) 67 amu (D) 98 amu

Tardigrade Admin · Accepted Answer

Molecular weight of X4 O 6=(4 a+96) ∵(4 a+96) g X4 O 6 contains X=4 a g ∴ 10 g X4 O 6 contains X =(4 a × 10/4 a+96) 5.72 =(4 a × 10/4 a+96) 22.88 a+549.12 =40 a 17.12 a =549.12 a =32.07 amu .

Q. A compound has the molecular formula $X_{4} O_{6} .$ If $10 g$ of $X_{4} O_{6}$ has $5.72 g X$ , then calculate atomic mass of $X$ .

32 amu

64 amu

67 amu

98 amu

Molecular weight of $X_{4} O_{6} = (4 a + 96)$
$∵ (4 a + 96) g X_{4} O_{6}$ contains $X = 4 a g$
$∴ 10 g X_{4} O_{6}$ contains $X = \frac{4 a \times 10}{4 a + 96}$
$5.72 = \frac{4 a \times 10}{4 a + 96}$
$22.88 a + 549.12 = 40 a$
$17.12 a = 549.12$
$a = 32.07$ amu .

Q. A compound has the molecular formula X4​O6​. If 10g of X4​O6​ has 5.72gX, then calculate atomic mass of X.