w19,6gkwasu fosforowegoV H3PO4 fosfor stanowi a)3,1g b)6,2g c)9,3g d)12,4g
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w19,6gkwasu fosforowegoV H3PO4 fosfor stanowi a)3,1g b)6,2g c)9,3g d)12,4g
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mH3PO4=3*1u+31u+4*16u=98u
98g H3PO4-----31g fosforu
19,6g H3PO4------xg fosforu
x = 6,2g fosforu
Odpowiedź b) jest prawidłowa.