Question

Number of g of oxygen in 32.2g of Na2SO4.10H2O is

Answer 1

Answer:

22.4g

molar mass of sodium sulphate decahydrate is

322g/mol

mass of substance=32.2g

moles=mass/molar mass=32.2/322=0.1mol

in 1 molecule of Na2SO4.10H2O

14 oxygen atoms are prsent

so in 0.1 mol of the substance there is 14×0.1=1.4mol O =1.4×16=22.4g