Home | Chemistry | Physical Chemistry | Some Basic Concepts | Mole Concept | Mcq | The Maximum Number Of Molecules Is Present In1 15 L Of H2nbspgas At Stpnbsp2 5 L Of N2nbspgas At Stp3 05 G Of H2nbspgasnbsp4 10 G Of O2nbspgas

MCQ

Mole Concept
By Sakshi Goel | 23 May'20 | 992 Views

MCQ

Problem:

The maximum number of molecules is present in

(1) 15 L of H2 gas at STP 

(2) 5 L of N2 gas at STP
(3) 0.5 g of H2 gas 

(4) 10 g of O2 gas


Solution:

For each of the options, we will calculate the number of moles.

At STP, 22.4 L = 1 mol

Moles of H2(g) = fraction numerator 15 over denominator 22.4 end fraction = 0.67 mol

moles of N2 (g)= fraction numerator 5 over denominator 22.4 end fraction = 0.223 mol
Moles of 0.5 g H2 gas = fraction numerator 0.5 over denominator 2 end fraction = 0.25 mol

moles of 10 g O2 gas = 10 over 32 = 0.1325 mol

Maximum number of moles = maximum number of molecules = option (a)


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