Chemistry
Select the correct answer from A, B, C and D : The ratio between the number of molecules in 2 g of hydrogen and 32 g of oxygen is:
(A) 1 : 2
(B) 1 : 0.01
(C) 1 : 1
(D) 0.01 : 1
[H = 1, O = 16]
Related Questions
From A, B, C, D, which weighs the least —
A : 2 g. atoms of Nitrogen
B : 1 mole of Silver
C : 22.4 lits. of oxygen gas at 1 atmos. press. and 273 K
D : 6.02 x 1023 atoms of carbon.
[Ag = 108, N = 14, O = 16, C = 12]
Calculate the mass of Calcium that will contain the same number of atoms as are present in 3.2 gm of sulphur. [S = 32, Ca = 40]
A gas of mass 32 gms has a volume of 20 litres at S.T.P. Calculate the gram mol. weight of the gas.
A gas cylinder contains 12 x 1024 molecules of oxygen gas.
Calculate : the mass of O2 present in the cylinder.
(ii) the volume of O2 at S.T.P. present in the cylinder.
[O = 16] Avog. no. is 6 × 1023