Вопрос школьника по предмету Химия
у воді масою 220 г розчинили глюкозу масою 25 г. Визначте масову частку глюкози в утвореному розчині
Ответ учителя по предмету Химия
Дано:
m(воды) =220 г
m(г) = 25 г
Найти:
W(г)
m(р-ра) = m(г) + m(воды) = 220 + 25 = 245 г
W(г) = m(г) / m(р-ра) *100% = 25 / 245 *100% = 10%
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