谁能教我用差量法解题啊 郁闷!例:NaHCO3和Na2CO3的混合物6.85g充分加热后,固体的质量变为5.3g.问原混合物中NaHCO3的质量是?(4.2g)2NaHCO3===Na2CO3+CO2+H2O 这个差量比为什么是62/6.85-5.362是什么,62哪来的.6
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![谁能教我用差量法解题啊 郁闷!例:NaHCO3和Na2CO3的混合物6.85g充分加热后,固体的质量变为5.3g.问原混合物中NaHCO3的质量是?(4.2g)2NaHCO3===Na2CO3+CO2+H2O 这个差量比为什么是62/6.85-5.362是什么,62哪来的.6](/uploads/image/z/10008793-1-3.jpg?t=%E8%B0%81%E8%83%BD%E6%95%99%E6%88%91%E7%94%A8%E5%B7%AE%E9%87%8F%E6%B3%95%E8%A7%A3%E9%A2%98%E5%95%8A+%E9%83%81%E9%97%B7%21%E4%BE%8B%3ANaHCO3%E5%92%8CNa2CO3%E7%9A%84%E6%B7%B7%E5%90%88%E7%89%A96.85g%E5%85%85%E5%88%86%E5%8A%A0%E7%83%AD%E5%90%8E%2C%E5%9B%BA%E4%BD%93%E7%9A%84%E8%B4%A8%E9%87%8F%E5%8F%98%E4%B8%BA5.3g.%E9%97%AE%E5%8E%9F%E6%B7%B7%E5%90%88%E7%89%A9%E4%B8%ADNaHCO3%E7%9A%84%E8%B4%A8%E9%87%8F%E6%98%AF%3F%284.2g%292NaHCO3%3D%3D%3DNa2CO3%2BCO2%2BH2O+%E8%BF%99%E4%B8%AA%E5%B7%AE%E9%87%8F%E6%AF%94%E4%B8%BA%E4%BB%80%E4%B9%88%E6%98%AF62%2F6.85-5.362%E6%98%AF%E4%BB%80%E4%B9%88%2C62%E5%93%AA%E6%9D%A5%E7%9A%84.6)
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