Question

which will have maximum number of molecule option (A)15 ltr H2 at STP (B) 10gm o2 (c) .5 gm H2 (d) 5 ltr N2​

Answer 1

Answer:This may help you

Explanation:

The maximum number of molecules is present in 15 L of H 2 gas at STP.

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

15 L of gas corresponds to 22.4L

15L=0.67 moles.

(B) 5 L of N 2 gas at STP :

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

5 L of gas corresponds to 22.4L

5L=0.22 moles.

(C) 0.5 g of H 2 gas (molecular weight 2 g/mol) corresponds to 2g/mol

0.5g =0.25 moles.

(D) 10 g of O 2 gas (molecular weight 3 g/mol) corresponds to 32g/mol 10g

​=0.3125 moles.

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

Therefore, the correct option is A.