Предмет: Химия, автор: Kolontaiii2

Определите количество вещества хлора Cl2,содержащее 0,2 *10^23 молекул

Ответы

Автор ответа: krioira

N= 0.2*10^23 (молекул)

n=N/Na, где Na - число Авогадро =6.02*10^23 (молекул/моль)
n= 0.2*10^23 / 6.02*10^23 = 0.03 (моль)
M(Cl2) = 2*35.5 = 71 (г/моль)
m=n*M= 0.03*71 = 2.13 (г)

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