Question

3 molar concentration of o2 is 96 gm, it contained in 2 litre vessel, active mass will be

Answer 1

Molarity is no of mole of solute per Litre of solution .
e.g Molarity = no of mole of solute /volumeof solution in L

Here,
given wt of solute = 96 g
mole of solute = given wt /molar wt
= 96 g/32g = 3

no of mole of solute = 3
volume of solution = 2 Litre

so,
molarity = 3/2 = 1.5 mol/Litre