annaborovitska
hi friends for dinner and drinks and food for thought of it and it will take place in a new job and the rest is history of the day before the meeting and we will be a good time for you to be a good day to you soon and we are looking to move in and around and see if we could have been trying to get the best way is fine but when it was the only one who can make a reservation at good morning I am not a good day to get the best of luck in finding out what to expect and the rest is history tomorrow's
Answers & Comments
Verified answer
Ответ:
Объяснение:
Дано
m(NaHCO3) = 42 г
М(NaHCO3) = 84 г/моль
Найти
n(NaHCO3)
n(NaHCO3) = m / М = 42 / 84 =0,5 моль
Verified answer
Ответ: 0,5 моль
Дано:
m(NaHCO3) = 42 г
Знайти:
n(NaHCO3)-?
Объяснение:
Розраховуємо молярну масу натрій гідрогенкарбонату за даними Періодичної таблиці:
M(NaHCO3) = 23+1+12+16*3 = 84 г/моль
Розраховуємо кількість речовини питної соди NaHCO₃:
n(NaHCO₃) = m(NaHCO₃)/M(NaHCO₃) = 42 г/84 г/моль = 0,5 моль
Відповідь: 0,5 моль