Предмет: Химия, автор: amahmudov851

78й помогите пожалуйста, даю 20 баллов

Приложения:

temirovs37: выбери лучший ответ, пожалуйста

Ответы

Автор ответа: temirovs37

Ответ:

D, 5,3%.

Объяснение:

1 моль кристаллогидрата = 286 грамм

0,05. = x. 14,3

14,3:286= 0,05 моль

1 моль Na2CO3 = 106

0,05 - х = 5,3 гр

0,05×106=5,3 гр

14,3+85,7 = 100 гр

100 г - 100%

5,3 - х = 5,3%

(5,3×100): 100= 5,3%

amahmudov851: 14,3/286?!

temirovs37: Да

amahmudov851: Спасибо)

amahmudov851: 5,3 это что? как получили

amahmudov851: Понятно я не туда написал

amahmudov851: , *

temirovs37: я же показал внизу, мы 0,05 умножили на 106

amahmudov851: Да понял, спасибо еще раз

temirovs37: Поставь лучший ответ, пожалуйста

amahmudov851: Готово

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