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The maximum number of molecules is present in. (a) 15 L of H2 gas at STP (b) 5 L of N2 gas at STP. (c) 1.5 g of H2 gas (d) 5 g of O2 gas
Asked by kdimple765 | 17 Jul, 2022, 01:24: PM
Dear Student,

The maximum number of molecules is present in 15 L of H2​ gas at STP.

(a) 1 mole of a gas at STP occupies a volume of 22.4 L.

15 L of H2 gas corresponds to 15 L / 22.4 L​ = 0.67 moles.

(b) 5 L of N2​ gas at STP :

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

5 L of gas corresponds to 5 L / 22.4 L ​= 0.22 moles.

(c) 1.5 g of H2​ gas (molecular weight 2 g/mol) corresponds to 1.5g​ / 2 g/mol = 0.75 moles.

(d) 5 g of O2​ gas (molecular weight 32 g/mol) corresponds to 5 g / 32 g/mol ​= 0.1562 moles.

Higher is the number of moles of a gas, higher will be its number of molecules.

Answered by | 19 Jul, 2022, 02:20: PM

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