4K + O₂ = 2K₂O
n(K) = m ÷ M = 15г ÷ 39г\моль = 0.38 моль
n(O₂) = n(K) = 0.38 моль ÷ 4 = 0.095 моль
V(O₂) = n × Vm = 0.095 моль × 22.4 л\моль = 2.128 л
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4K + O₂ = 2K₂O
n(K) = m ÷ M = 15г ÷ 39г\моль = 0.38 моль
n(O₂) = n(K) = 0.38 моль ÷ 4 = 0.095 моль
V(O₂) = n × Vm = 0.095 моль × 22.4 л\моль = 2.128 л