Ответ:
Mr (H3 BO3)=3 * Ar(H) + Ar(B) + 3 * Ar(O)=3 + 11 + 48 = 62
W(H)=(3*1)\62 * 100% = 4.8%
W(B)=(1*11)\62 * 100% = 17.7%
W(O)=100% - 4.8% - 17.7% = 77.5%
Объяснение:
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Ответ:
Mr (H3 BO3)=3 * Ar(H) + Ar(B) + 3 * Ar(O)=3 + 11 + 48 = 62
W(H)=(3*1)\62 * 100% = 4.8%
W(B)=(1*11)\62 * 100% = 17.7%
W(O)=100% - 4.8% - 17.7% = 77.5%
Объяснение: