Ответы на вопрос:
Дано m(mgcl2) = 7.6 g m(ppa naoh) =50 g w(naoh) =16% m(mg(oh) m(naoh) = 50*16% / 100% = 8 g m(naoh) = 40 g/mol n= m/m = 8/40 = 0.2 mol m(mgcl2) = 95 g/mol n(mgcl2) = m/m = 7.6/ 95 = 0.08 mol n(naoh) > n(mgcl2) m(mg(oh)2) = 58 g/mol 2naoh+mgcl2--> mg(oh)2+2nacl n(mgcl2)= n(mg(oh)2) = 0.08 mol m(mg(oh)2) = n*m = 0.08*58 = 4.64 g ответ 4.64 г
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