题目内容：
同温同压下与4gH2气体体积相同的O2气体为__________g。参考答案：
答案解析：
填空题：同温同压下与4gH2气体体积相同的O2气体为__________g。
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- 题目类型：填空题
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按系统命名法，有机物的名称为__________
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