Calculate the number of moles of methane in 0.80 g of methane.

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Solution

The molecular formula of methane= ${CH}_{4}$
The molecular mass of methane = (Mass of $C +$ $4 \times$ Mass of $H$ )
= ( $12 + 4 \times 1$ )
= 16g
Number of moles of methane = $\frac{G i v e n m a s s o f m e t h a n e}{M o l e c u l a r m a s s o f m e t h a n e}$
$= \frac{0.80}{16}$
The number of moles of methane in 0.80 g of methane = 0.05 moles.

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