The simplest formula of a compound containing 50% X(atomic mass 10 u) and 50% Y (Atomic mass 20 u) is :

X Y_{2}

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X_{2} Y

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X_{2} Y_{3}

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Solution

The correct option is A $X_{2} Y$
$X_{2} Y$ .
Total molecular mass of $X_{2} Y = 2 \times X + 1 \times Y$
$2 \times 10 + 1 \times 20 = 20 + 20 = 40$
Total masses of X and Y in $X_{2} Y$ are 20 and 20.
Percentage of masses of X and Y in $X_{2} Y$ are 50% each.

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The simplest formula of a compound containing $50 %$ of element X (atomic mass 10) and $50 %$ of element Y (atomic mass 20) is

The simplest formula of a compound containing 50% of element X (atomic mass = 10g/mol) and 50% of element Y (atomic mass 20g/mol) is:

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The simplest formula of a compound containing $50 %$ of element X (atomic mass 10) and $50 %$ of element Y (atomic mass 20) is

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