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:
Mr (MgCl2) = Ar (Mg) * N (Mg) + Ar (Cl) * N (Cl) = 24 * 1 + 35,5* 2 = 95;
ω (Mg в MgCl2) = N (Mg в MgCl2) * Ar (Mg) * 100% / Mr (MgCl2) = 1 * 24 * 100% / 95 = 25,3%;
ω (Cl в MgCl2) = 100% - ω (Mg в MgCl2) = 100% - 25,3% = 74,7%.
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:
Mr (MgCl2) = Ar (Mg) * N (Mg) + Ar (Cl) * N (Cl) = 24 * 1 + 35,5* 2 = 95;
ω (Mg в MgCl2) = N (Mg в MgCl2) * Ar (Mg) * 100% / Mr (MgCl2) = 1 * 24 * 100% / 95 = 25,3%;
ω (Cl в MgCl2) = 100% - ω (Mg в MgCl2) = 100% - 25,3% = 74,7%.