Question

铝，铁各5.4g与足量的稀硫酸反应，欲得到相同质量的氢气，求参加反应的铝，铁的质量比

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Answer 1

2Al+3H2SO4==Al2(SO4)3+3H2 54.....................6 5.4....................0.6 Fe+H2SO4==FeSO4+H2 56...............2 5.4..............0.19 5.4克铝与硫酸产生的气体多 如果产生相同质量的氢气 2Al+3H2SO4==Al2(SO4)3+3H2 54.....................6 X......................m........x=54m/6 Fe+H2SO4==FeSO4+H2 56...............2 y......................m..........y=56m/2 x/y=9/28 即铝与铁质量比为9/28

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