1.物質(zhì)的量濃度 = 溶質(zhì)的物質(zhì)的量/溶液體積 = (30g/40g/mol) / (30+500)/1.02/1000(L) = 1.44(mol/L)
2.物質(zhì)的量濃度 = 溶質(zhì)的物質(zhì)的量/溶液體積 = (700L/22.4L/mol) /( (1000+700/22.4*17)g/0.9g/ml/1000ml/L) = 18.37 mol/L
3.Zn + 2HCl = H2 + ZnCl2
2mol 22.4L
x 8.96L
解出：x = 0.8mol,那么鹽酸的物質(zhì)的量濃度 = 0.8mol /0.2L = 4mol/L
4.鹽酸的物質(zhì)的量濃度 = 溶質(zhì)的物質(zhì)的量/溶液體積 = (5.6L/22.4L/mol )/0.5L = 0.5mol/L
5.NaOH的物質(zhì)的量濃度 = 溶質(zhì)的物質(zhì)的量/溶液體積 = (0.03L*0.5mol/L)/0.5L = 0.03mol/L