Объяснение:
mr(h2o2)= 2+32=34
w(O2)= (32/34)*100%=94%
w(H2)=100-94=6%
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Объяснение:
mr(h2o2)= 2+32=34
w(O2)= (32/34)*100%=94%
w(H2)=100-94=6%