Which of the following contains maximum number of molecules?
1 g CO2
1 g N2
1 g H2
1 g CH4
The relative molecular mass of Na2S2O3.5H2O is
250 a.m.u.
250 g
248 a.m.u.
248 g
If empirical formula of an organic compound is CH2O then its molecular formula can be
C2H2O2
C2H4O
C3H6O
C6H12O6
How many moles of oxygen are produced by the decomposition of six moles of potassium chlorate? 2KClO3 → 2KCl + 3O2↑
3 moles
6 moles
9 moles
12 moles
The number of atoms present in one molecule of an element is called its
Atomic mass
Molecular mass
Avagadro number
Atomicity
A molecule of CH4 contains hydrogen atoms of
4
3
2
5
Atomic mass of an element expressed in grams is called
atomic mass
Gram atomic mass
Molar mass
The volume occupied by one mole of a gas at S.T.P. is known as
Atomic volume
Molar volume
Gaseous volume
Thermal volume
Sulphur is molecule is composed of eight similar atoms hence it is
Diatomic
Octatomic
Decatomic
Deciatomic
One mole of H2SO4 = ____ moles of oxygen.
32
16
8