The mass of 112 litres of methane gas $({CH}_{4})$ at STP is:

160 g

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80 g

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40 g

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60 g

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Solution

The correct option is B 80 g
Given: Volume of methane = 120 litres
Molar volume at STP (litres) = 22.4
Gram molecular mass of methane = 16 g

In the case of gases at STP,
Mass = $\frac{Volume at STP (litres)}{Molar volume at STP (litres)} \times gram molecular mass$

$∴$ Mass = $\frac{112}{22.4} \times 16$ = 80 g

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The mass of 112 litres of methane gas (CH4) at STP is:

The correct option is B 80 gGiven: Volume of methane = 120 litres Molar volume at STP (litres) = 22.4 Gram molecular mass of methane = 16 g In the case of gases at STP, Mass = Volume at STP (litres)Molar volume at STP (litres)×gram molecular mass ∴ Mass = 11222.4×16 = 80 g

The mass of 112 litres of methane gas $({CH}_{4})$ at STP is: