Question

The mass of 120 cm cube (cm3) of CH4 gas at STP is​

Answer 1

Answer:

0.0857g

Explanation:

1 mole of a gas occupies 22.4 L of a gas at STP.

Since, the molecular weight of methane is 16 g,

Therefore, at STP, 22.4 L corresponds to 16 g.

120cm cube or 0.120L will correspond to  (16×0.120)/22.4 = 0.0857g.

Hence 0.0857g is correct answer.