1. The number of mole of 54.5 dm³ of CH₄ at STP is 2.43 moles of CH₄
2. The number of mole of 250 cm³ of CO at STP is 0.01 mole
At standard temperature and pressure (STP),
1 mole of gas = 22.4 dm³ = 22400 cm³
At standard temperature and pressure (STP),
22.4 dm³ = 1 mole of CH₄
Therefore,
54.5 dm³ = (54.5 dm³ × 1 mole) / 22.4 dm³
54.5 dm³ = 2.43 moles of CH₄
At standard temperature and pressure STP,
22400 cm³ = 1 mole of CO
Therefore,
250 cm³ = (250 cm³ × 1 mole) / 22400 cm³
250 cm³ =0.01 mole of CO
Learn more about volume of gas at STP:
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