2 g of oxygen contain number of atoms equal to that contained in

Options

A. 0.5 g hydrogen
B. 4.0 g sulphur
C. 7.0 g nitrogen
D. 2.3 g sodium

Answer

B

Explanation

2 g oxygen= 2/32 = 1/160 mol
4 g sulphur = 4/64 = 1/16 mol
` because ` 1 mol of each substance contain `6.023 xx 10^23` molecules.
` therefore ` Equal number of mole will also contain equal number of molecules.