Pick out the correct statement from the following.

Pick out the correct statements from the following. Also correct the incorrect state-ments: The mass of 1/2 mol nitrogen gas is 14 g.

Pick out the correct statements from the following. Also correct the incorrect statements: 2 mol chlorine contain 4xx6.022xx10^(23) chlorine molcules.

Pick out the correct statements from the following. Also correct the incorrect state-ments: The number of molecules present in 1 mol hydrogen and 1 mol oxygen are same.

Pick out the correct statements from the following I. Electron emission during Brta -decay is always accompanied by neutrons. II. Nuclear force is charge independent. III. Fusion is the chief source of stellar energy.

Pick out the correct statements from the following. Also correct the incorrect state-ments: 0.5 mol water has the mass 9g. There are 6.022xx10^(23) H_2O molecules in it. (Atomic mass H=1,O=16,CI=35.5, N=14)