Ответ:
Объяснение:
Mr(Mg3(PO4)2) = Ar(Mg) * 3 + (Ar(P) + Ar(O) * 4) * 2 =
=24 * 3 + (31 + 16 *4)* 2 = 262 г/моль
w(Mg) = Ar(Mg) * n /Mr(Mg3(PO4)2) *100% = 24 *3/262 * 100% = 27,5%
w(Р) = Ar(Р) * n /Mr(Mg3(PO4)2) *100% = 31 *2/262 * 100% = 23,7%
w(О) = Ar(О) * n / Mr(Mg3(PO4)2) *100% = 16* 8 /262 * 100% = 48,8%
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Ответ:
Объяснение:
Mr(Mg3(PO4)2) = Ar(Mg) * 3 + (Ar(P) + Ar(O) * 4) * 2 =
=24 * 3 + (31 + 16 *4)* 2 = 262 г/моль
w(Mg) = Ar(Mg) * n /Mr(Mg3(PO4)2) *100% = 24 *3/262 * 100% = 27,5%
w(Р) = Ar(Р) * n /Mr(Mg3(PO4)2) *100% = 31 *2/262 * 100% = 23,7%
w(О) = Ar(О) * n / Mr(Mg3(PO4)2) *100% = 16* 8 /262 * 100% = 48,8%