已知钠与水反应的化学方程式为:2Na+2H2O = 2NaOH + H2↑.质量均为m g的钠、镁、锌三种金属分别与25 g 质质量分数为19.6% 的稀硫酸反应.(1)由于金属的量不确定,产生的氢气的质量大小有多种可
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![已知钠与水反应的化学方程式为:2Na+2H2O = 2NaOH + H2↑.质量均为m g的钠、镁、锌三种金属分别与25 g 质质量分数为19.6% 的稀硫酸反应.(1)由于金属的量不确定,产生的氢气的质量大小有多种可](/uploads/image/z/6425939-11-9.jpg?t=%E5%B7%B2%E7%9F%A5%E9%92%A0%E4%B8%8E%E6%B0%B4%E5%8F%8D%E5%BA%94%E7%9A%84%E5%8C%96%E5%AD%A6%E6%96%B9%E7%A8%8B%E5%BC%8F%E4%B8%BA%EF%BC%9A2Na%2B2H2O+%3D+2NaOH+%2B+H2%E2%86%91.%E8%B4%A8%E9%87%8F%E5%9D%87%E4%B8%BAm+g%E7%9A%84%E9%92%A0%E3%80%81%E9%95%81%E3%80%81%E9%94%8C%E4%B8%89%E7%A7%8D%E9%87%91%E5%B1%9E%E5%88%86%E5%88%AB%E4%B8%8E25+g+%E8%B4%A8%E8%B4%A8%E9%87%8F%E5%88%86%E6%95%B0%E4%B8%BA19.6%25+%E7%9A%84%E7%A8%80%E7%A1%AB%E9%85%B8%E5%8F%8D%E5%BA%94.%EF%BC%881%EF%BC%89%E7%94%B1%E4%BA%8E%E9%87%91%E5%B1%9E%E7%9A%84%E9%87%8F%E4%B8%8D%E7%A1%AE%E5%AE%9A%2C%E4%BA%A7%E7%94%9F%E7%9A%84%E6%B0%A2%E6%B0%94%E7%9A%84%E8%B4%A8%E9%87%8F%E5%A4%A7%E5%B0%8F%E6%9C%89%E5%A4%9A%E7%A7%8D%E5%8F%AF)
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