Предмет: Химия, автор: nikichuk2008

Скільки г солі необхідно, щоб приготувати 45 % розчин масою
150 г.

Ответы

Автор ответа: shroljulia
0

Ответ:

67, 5 г

Объяснение:


nikichuk2008: ок спасибо а можно обяснениє?
Автор ответа: aleksia58
1

Ответ:

82,5 грамм.

Объяснение:

m Розчин = 150(г.)

W Речовина = 45%= 0,45

m Речовина = ?

m H2O = ?

Решение:

m Речовина= W Речовина× m Розчин

m Речовина = 0,45 ×150=67.5 (г.)

m H2O = m Розчин - m Речовина

m H2O = 150 - 67.5 = 82,5 (г.)


nikichuk2008: ахаххаха спасибо
nikichuk2008: небольшая ошибка в m речовина не 0 2 а 045 а так спасибо
shroljulia: так нужно же найти масу соли а не води
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