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Связь количества вещества и массы:
n = m/M
Связь количества вещества и объема газа:
n = V/Vm
Приравниваем правые части
m/M = V/Vm
и выражаем объем газа через массу:
V = m * Vm/M.
Рассчитываем объемы газов:
аммиак - m*22,4/17 = 1,32m
кислород - m*22,4/32 = 0,7m
озон - m*22,4/48 = 0,47m
водород - m*22,4/2 = 11,2m
Из приведенных расчетов видно, что при одинаковой массе наибольший объем занимает водород.
ответ: 4) водород
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NH2 NH3Br
Находим массу продукта реакции (M(Br) = 80 г/моль)
80 г/моль - 51,3%
Х г/моль - 100%
Х = 156 г/моль
Находим массу продукта реакции в общем виде и выводим формулу вещества
М = 12n+2n+1+12+1+14+3+80+12+32+1=14n + 156 г/моль
14n + 156 = 156
n = 0
Формула продукта реакции
NH3Br - СH2 - COOH
Аминокислота NH2 - CH2 - COOH аминоэтановая кислота (глицин)
М (кислоты) = 75 г/моль