Ответ:
NH3 = 14 + 3*1 = 17
Al2O3 = 2*27 + 3*16 = 54 + 48 = 102
H2SO4 = 2*1 + 32 + 4*16 = 2 + 32 + 64 = 98
HCl = 1 + 35,5 = 36,5
NaCl = 23 + 35,5 = 58,5
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Ответ:
NH3 = 14 + 3*1 = 17
Al2O3 = 2*27 + 3*16 = 54 + 48 = 102
H2SO4 = 2*1 + 32 + 4*16 = 2 + 32 + 64 = 98
HCl = 1 + 35,5 = 36,5
NaCl = 23 + 35,5 = 58,5