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a)0.5*6.02*10^23=3.01*10^23 вода

5.32*6.02*10^23=32.02*10^23 Cl

12.35*6.02*10^23=74.35*10^23

b) 6.02*10^24/6.02*10^23=10моль

18.63*10^24/6.02*10^23=30 моль

0.6*10^22/6.02*10^23=0.01 моль