A certain compound has the molecular formula `X_(4)O_(6)`. If 10g of `X_(4)O_(6)` has 5.72g X, the atomic mass of X is:

Options

A. 32 amu
B. 37 amu
C. 42 amu
D. 98 amu

Answer

A

Explanation

Let the atomic weight of X be .x. , `" 1"mol of " X_(4)O_6 = 4` mol of X
`("wt . of " X_4O_6)/("At.wt. of"X_4O_6)=("wtof"X)/("At.wt.of"4X)implies10/(4x + 6xx16)=(5.72)/(4x) :. x =32 `amu