Ответы на вопрос:
Дано m(c2h5oh) = 230 g v( 2c2h5oh+7o2--> 4co2+6h2o m(c2h5oh) = 46 g/mol n(c2h5oh) = m/m = 230/46 = 5 mol 2n(c2h5oh) = 7n(o2) n(o2) = 7 * 5 / 2 = 17.5 mol v(o2) = n*vm = 17.5 * 22.4 = 392 l ответ 392 л
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