The simplest formula of a compound containing 50% of element X(atomic mass = 10) and 50%.ofthe element Y(atomic mass = 20) by weight is:

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The simplest formula of a compound containing 50% of element X(atomic mass = 10) and 50%.ofthe element Y(atomic mass = 20) by weight is:

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$X Y_{2}$

$X_{2}^{} Y_{3}$

$X_{2} Y$

answer is B.

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Detailed Solution

Let mass of compound $= 100 g m$

Then mass of $X = 50 g m$

Then mass of $Y = 50 g m$

Mole of $X = \frac{50}{10} = 5$

Mole of $Y = \frac{50}{10} = 5$

Molecular formula $= X_{5} Y_{25} = X_{2} Y$

$\begin{array}{l} \frac{50}{10} : \frac{50}{20} \\ 2 : 1 \\ X_{2} Y \end{array}$

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