Question

What will be the mass of sodium in 30g of sodium sulphate

Answer 1

9.706 gram . will be the mass of sodium in 30g of sodium sulphate .

Explanation:

molecular weight of  Na2SO4   sodium sulphate : 142.04 g/mol

30 gram of Na2SO4 has = 30/142

                                      = 0.211 moles

1 mol of Na2SO4 ha 2 mol of Na

0.211 moles of Na2SO4 will have = 2*0.211 moles

                                                      = 0.422 moles .

1 mol of Na = 23 g

0.422 mole has  = 23*0.422

                         = 9.706 gram .