Question

Mass Of 7 liters of co2 at STP is ....???

Answer 1

The mass of  carbon dioxide gas is 13.7588 g.

We have to find the mass of 7 litres of CO₂ gas at STP.

At standard temperature and pressure,

• pressure, P = 1 atm
• Temperature, T = 273K
• Here, volume of gas, V = 7 litres

Now, use the universal gas equation, PV = nRT

⇒ 1 atm × 7 L = n × 0.082 atm.L/mol/K × 273K

⇒ n = 0.3127 mole

We know, the molar mass of CO₂ gas = 44g/mol

∴ mass of 0.3127 moles = 0.3127 mole × 44g/mol = 13.7588g

Therefore the mass of  carbon dioxide gas is 13.7588 g.

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