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Molecules and Atomicity

An element A ...

Question

An element A (atomic weight $= 12$ ) and B (atomic weight $= 35.5$ ) combines to form a compound X. If $4$ mol of B combines with $1$ mol of A to give $1$ mol of X. The weight of $1$ mol of X would be :

47.5 g

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74.0 g

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154.0 g

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148.8 g

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Solution

The correct option is C 154.0 g
Given:
Atomic weight of A= 12 and B= 35.5
A and B combine to form a compound X and the reaction can be given as:
$\begin{matrix} 4 B + A \to X 4 \times 35.5 + 12 \to ? \end{matrix}$
Weight of X = ( $4 \times 35.5$ ) + $12$ = 154 g
So the correct option is C.

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An element A (atomic weight =12) and B (atomic weight =35.5) combines to form a compound X. If 4 mol of B combines with 1 mol of A to give 1 mol of X. The weight of 1 mol of X would be :

The correct option is C 154.0 gGiven: Atomic weight of A= 12 and B= 35.5A and B combine to form a compound X and the reaction can be given as:4B+A→X4×35.5+12→?Weight of X = (4×35.5) + 12 = 154 gSo the correct option is C.

An element A (atomic weight $= 12$ ) and B (atomic weight $= 35.5$ ) combines to form a compound X. If $4$ mol of B combines with $1$ mol of A to give $1$ mol of X. The weight of $1$ mol of X would be :

The correct option is C 154.0 g
Given:
Atomic weight of A= 12 and B= 35.5
A and B combine to form a compound X and the reaction can be given as:
$\begin{matrix} 4 B + A \to X 4 \times 35.5 + 12 \to ? \end{matrix}$
Weight of X = ( $4 \times 35.5$ ) + $12$ = 154 g
So the correct option is C.