Assertion (A): `1 g` of `O_(2)` and `1 g` atom of `O_(3)` have equal number of molecules.
Reason (R ): Mass of 1 mol atom is equal to its gram atomic mass.

Assertion: 1 mol of O and 1 mol of O_(2) contain equal number of particles. Reason: 1 mol of molecules is always double than 1 mol of atoms in all diatomic molecules.

1 atomic mass unit is equal to

1 atomic mass unit is equal to

Mass of 1 gram-atom of oxygen is_____g.

1 gram atom of C and 1 gram atom of sulphur have same mass.