Q58 / 270 · NDA 2014 (Phase 2) · General Ability

A compound $\mathrm{X}_2 \mathrm{O}_3$ contains $31.58 \%$ oxygen by weight. The atomic mass of X is

  • A
    $34.66 \mathrm{~g} \mathrm{~mol}^{-1}$
  • B
    $45.01 \mathrm{~g} \mathrm{~mol}^{-1}$
  • Correct answer
    C
    $52.00 \mathrm{~g} \mathrm{~mol}^{-1}$
  • D
    $104.00 \mathrm{~g} \mathrm{~mol}^{-1}$

Solution

The correct answer is option (C)

Hence, the correct answer is option: 'C'.

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