M(K)=78г v(O2)=? K+O2=

Question

M(K)=78г v(O2)=? K+O2=

Answer 1

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Answer 2

4K + O2 == 2K2O

n(K)= m:M = 78г:39г/моль = 2 моль |=> n(O2) = n(K) = 0.5 моль

n(O2)= V(O2):22.4 л/моль |=> V(O2)= 0.5 моль * 22.4 л/моль = 11.2 л