在一密闭容器中有CH4和02混合气体共20g,放入足量Na2O2用电火花引燃,使其完全反应,Na2O2增重8g,则原混合气体中O2的质量分数是?
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![在一密闭容器中有CH4和02混合气体共20g,放入足量Na2O2用电火花引燃,使其完全反应,Na2O2增重8g,则原混合气体中O2的质量分数是?](/uploads/image/z/4869946-10-6.jpg?t=%E5%9C%A8%E4%B8%80%E5%AF%86%E9%97%AD%E5%AE%B9%E5%99%A8%E4%B8%AD%E6%9C%89CH4%E5%92%8C02%E6%B7%B7%E5%90%88%E6%B0%94%E4%BD%93%E5%85%B120g%2C%E6%94%BE%E5%85%A5%E8%B6%B3%E9%87%8FNa2O2%E7%94%A8%E7%94%B5%E7%81%AB%E8%8A%B1%E5%BC%95%E7%87%83%2C%E4%BD%BF%E5%85%B6%E5%AE%8C%E5%85%A8%E5%8F%8D%E5%BA%94%2CNa2O2%E5%A2%9E%E9%87%8D8g%2C%E5%88%99%E5%8E%9F%E6%B7%B7%E5%90%88%E6%B0%94%E4%BD%93%E4%B8%ADO2%E7%9A%84%E8%B4%A8%E9%87%8F%E5%88%86%E6%95%B0%E6%98%AF%3F)
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