Răspunsuri

2014-11-05T19:09:52+02:00
P(OH)5 = 15+ 5* 16 + 5* 1 = 100 g , cantareste un mol

Cant substanta = 100 - 12,4= 87,6
Masa unui mol = 100 g atunci masa substantei e 100 /50 = 2g
2014-11-05T19:48:28+02:00
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