Вопрос школьника по предмету Химия
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1.Визначте молекулярну формулу насиченого одноатомного спирту, відносна молекулярна маса якого 32.
2. Обчисліть масу етанолу, який прореагував із натріем кількістю речовини 1, 75 моль.
Ответ учителя по предмету Химия
1)Формула- СНОН находим массу -(ОН)=16+1=17 на карбон и гидроген приходится-32-17=15 карбон входит раз на водород-15-12=3
формула СН3ОН- метанол
2) уравнение находим массу этанола m(C2H5OH)=12*2+1*5+16+1=46
х гр 1,75 моль
2С2H5OH+2Na=2C2H5ONa+H2
2*46 2моль
хгр——————————1,75моль
92гр————————-2моль
х=1,75*92/2= 80,5 грамм спирта
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