ответ: №4, т.к. Mr(H3PO4) = 3Ar(H) + Ar(P) + 4Ar(O) = 3*1 + 31+ 4*16 = 98,
w(P)= 31/98 *100 = 32%
Mr(H3PO4) = 3Ar(H) + Ar(P) + 4Ar(O) = 3*1 + 31+ 4*16 = 98,
w(P)= 31/98 *100 = 32%=0,32
ответ: №4, т.к. Mr(H3PO4) = 3Ar(H) + Ar(P) + 4Ar(O) = 3*1 + 31+ 4*16 = 98,
w(P)= 31/98 *100 = 32%
Mr(H3PO4) = 3Ar(H) + Ar(P) + 4Ar(O) = 3*1 + 31+ 4*16 = 98,
w(P)= 31/98 *100 = 32%=0,32