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zauryadnaya
@zauryadnaya
March 2022
1
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Найдите количество вещества,если дано:
1)50 г оксида кальция
2) 12л кислорода
3) 18,06х10-23 кислорода
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Answers & Comments
chemistry0ua
1)
n = m / Mr
Mr ( CaO ) = 40 + 16 = 56
n ( CaO ) = 56 / 50 = 1,12 моль
2)
n = V / Vm
Vm = 22,4 л/моль
n ( O2 ) = 12 / 22,4 = 0,535 моль
3)
n = N / Na
Na = 6,02 • 10^23
n ( O2 ) = 18,06 / 6,02 = 3 моль
Ответ:
1) n ( CaO ) = 1,12 моль
2) n ( O2 ) = 0,535 моль
3) n ( O2 ) = 3 моль
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Answers & Comments
n = m / Mr
Mr ( CaO ) = 40 + 16 = 56
n ( CaO ) = 56 / 50 = 1,12 моль
2)
n = V / Vm
Vm = 22,4 л/моль
n ( O2 ) = 12 / 22,4 = 0,535 моль
3)
n = N / Na
Na = 6,02 • 10^23
n ( O2 ) = 18,06 / 6,02 = 3 моль
Ответ:
1) n ( CaO ) = 1,12 моль
2) n ( O2 ) = 0,535 моль
3) n ( O2 ) = 3 моль