Предмет: Математика, автор: zanibekmuhituly

3-тапсырма Ерiтiндiдегi тұздың мөлшері 32% а) 75 кг ерітіндіде канша кг туз бар? b) Құрамында 12,8 кг туз болуы үшiн канша кг ерiтiндi керек?
дам 10 балов

Ответы

Автор ответа: Usergeorg

1

Ответ:

Пошаговое объяснение:

Ерітіндіде 32% тұз бар

Бұл әрбір 100 кг ерітіндіге 32 кг тұзды білдіреді

Бізде 75 кг ерітінді бар

Тұздың мөлшерін табу үшін:

32% ондық бөлшекке түрлендіру: 0,32

Ерітіндінің мөлшеріне көбейтіңіз: 0,32 * 75 кг = 24 кг тұз

Демек, 75 кг ерітіндіде 24 кг тұз болады.

Енді екінші бөлімге:

Қанша ерітіндіде 12,8 кг тұз бар екенін табу керек

Бізге қажетті ерітіндінің 32% тұз екенін білеміз

Сонымен 12,8 кг тұз жалпы ерітіндінің 32% құрайды

Пропорцияны орнатайық:

12,8 кг / х кг = 0,32

Мұндағы x - бізге қажет шешім мөлшері

Айқас көбейту:

12,8 кг * 100 / 0,32 = 4000 кг

Сондықтан 12,8 кг тұз болуы үшін бізге 4000 кг ерітінді қажет.

Usergeorg: жауап сізге ұнаса лайк басыңыз

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