6.8g过氧化氢中含氧元素的质量是多少
6.8g过氧化氢中含氧元素的质量是多少
化学人气:968 ℃时间:2020-05-05 05:22:31
优质解答
6.8×(2×16)÷(2×1+2×16)
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