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varogg tareee!! Urgeeent​

Varogg Tareee Urgeeent class=

Răspuns :

4P+5O2->2P2O5
1 mol P....31g
X moli ....6.2
X=6.2/31=0.2moliP
4 moli P..... 5 Moli O2
0.2 moli P....y moli O2
Y=0.2*5/4=0.25 moli O2=>B)