Which of the following has maximum
mass ?
a) 1.0 mole of H2 gas
b) 0.5 mole of sucrose (C12H22O11)
c) 1.2 mole of silver
d) 22.4 mole of N2 at N.T.P.
Answers
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.
Answer:
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 answer is A