х. 4
2Na+H2-->2NaH
n(H2)=89,6:22,4=4моль
х=4×2:1=8моль
m(Na)=8×23=184г
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х. 4
2Na+H2-->2NaH
n(H2)=89,6:22,4=4моль
х=4×2:1=8моль
m(Na)=8×23=184г