Ответ:
Mr (Al2O3) = Ar (Al) * N (Al) + Ar (O) * N (O) = 27 * 2 + 16 * 3 = 102;
ω (Al в Al2O3) = N (Al в Al2O3) * Ar (Al) * 100% / Mr (Al2O3) = 2 * 27 * 100% / 102 = 52,94%;
ω (O в Al2O3) = 100% - ω (Al в Al2O3) = 100% - 52,94% = 47,06%.
Объяснение:
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Ответ:
Mr (Al2O3) = Ar (Al) * N (Al) + Ar (O) * N (O) = 27 * 2 + 16 * 3 = 102;
ω (Al в Al2O3) = N (Al в Al2O3) * Ar (Al) * 100% / Mr (Al2O3) = 2 * 27 * 100% / 102 = 52,94%;
ω (O в Al2O3) = 100% - ω (Al в Al2O3) = 100% - 52,94% = 47,06%.
Объяснение: