CBSE Class 11-science Answered
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.
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