Question

A certain compound has the molecular formula $X_4{O}_6$. Find the atomic mass of X if $10$ g of $X_4{O}_6$ has $5.72$ g X.

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

Answer 1

The correct option is A $32amu$

$\frac{\text{Molecular weight of}{X}_4{O}_6}{\text{Atomic weight of 4 X}}=\frac{\text{Weight of}{X}_4{O}_6}{\text{Weight of X}}$

$⟹\frac{4x+96}{4x}=\frac{10}{5.72}$

$\therefore x=32$ g