#1
w(h2o)=7M(h2o)/M(mgso4*7h2o)=7*18*100%/(120+7*18)=51.2%
#2
w(o)=9M(o)/M(cuso4*5h2o) =9*16*100%/(160+5*18)=57.6%
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Answers & Comments
#1
w(h2o)=7M(h2o)/M(mgso4*7h2o)=7*18*100%/(120+7*18)=51.2%
#2
w(o)=9M(o)/M(cuso4*5h2o) =9*16*100%/(160+5*18)=57.6%