# what is the weight of 5.6 L of CH4 at stp

The molar mass CH4 is 16 g.
As we known 1 mole of any gas at STP occupies 22.4 L of volume.
Therefore, 16 g of CH4 gas occupies 22.4 L of volume
Therefore 22.4 L of gas has a mass = 16 g
Mass of 5.6 L of gas = 16 $×$ 5.6 / 22.4
Hence, mass of 5.6 L of methane gas is 4 g.

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