Все значение взяты из таблицы Менделеева
M(CL2) = 35.5*2 = 71 g/mol
M(H2SO4) = 1*2+32+16*4 = 98 g/mol
M(C12H22O11) = 12*12+1*22+16*11 = 342 g/mol
M(Cu) = 63.5 g/mol
M(CaSO4) = 40+32+16*4 = 136 g/mol
M(CaCO3)= 40+12+16*3 = 100 g/mol
M((CuOH)2CO3) = (63.5+16+1)*2 + 12+16*3 = 221 g/mol