дано
m(O2) = 8 g
----------------------
N(O2) -?
N(O2) = (m(O2) / M(O2))*N(A) * n , n- число атомов в молекуле
N(A) = 6.02*10^23 at
M(O2) = 32 g/mol
N(O2) = ( 8 / 32) * 6.02*10^23 * 2 = 3.01*10^23 at
ответ 3.01*10^23 атомов
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Verified answer
дано
m(O2) = 8 g
----------------------
N(O2) -?
N(O2) = (m(O2) / M(O2))*N(A) * n , n- число атомов в молекуле
N(A) = 6.02*10^23 at
M(O2) = 32 g/mol
N(O2) = ( 8 / 32) * 6.02*10^23 * 2 = 3.01*10^23 at
ответ 3.01*10^23 атомов