Ответ:
Mr(HNO3) = 1 + 14 + 3 • 16 = 1 + 14 + 48 = 63
W(O) = 3•16 : 63 • 100% = 48:63 • 100% ≈ 76.2%
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Ответ:
Mr(HNO3) = 1 + 14 + 3 • 16 = 1 + 14 + 48 = 63
W(O) = 3•16 : 63 • 100% = 48:63 • 100% ≈ 76.2%