Предмет: Химия, автор: Аноним

помогите пожалуйста!!!
определите массовую долю раствора сахара, если в 180 г. воды растворили 40г. сахара.
напишите пожалуйста дано и решение

Ответы

Автор ответа: kurull235
0
Дано:
m(воды) = 180г
m(сахара) = 40г
Рассчитать:
ω = ?

Решение:
Рассчитаем массу раствора:
m(р-ра) = m(сах.) + m(воды) = 180г + 40г = 220г
Рассчитаем массовую долю:
ω = m(сах.)/m(р-ра) * 100% = 40г / 220г * 100% = 18,1%
Ответ: ω = 18,1 %

 
Автор ответа: Senpoliya
0
180 + 40 = 220 г - масса раствора
w%(сахара) = 40 : 220 * 100 = 18,18 %
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