把a克固体NaHCO3加热分解一段时间后,固体质量变为b克.
把a克固体NaHCO3加热分解一段时间后,固体质量变为b克.
1)尚未分解的NaHCO3为___克.
(2)生成Na2CO3的质量为______克.
(3)当b的质量为___克时,表明NaHCO3完全分解.
2NaHCO3=Na2CO3+H20+CO2
168·······················62
a b
1)尚未分解的NaHCO3为___克.
(2)生成Na2CO3的质量为______克.
(3)当b的质量为___克时,表明NaHCO3完全分解.
2NaHCO3=Na2CO3+H20+CO2
168·······················62
a b
化学人气:625 ℃时间:2020-02-01 07:21:31
优质解答
2NaHCO3=Na2CO3+H20+CO2 固体质量减少168 106 168-106=62y a-by=84(a-b)/311)尚未分解的NaHCO3为_(84b-53a)/31_克.y=53(a-b)/31(2)生成Na2CO3的质量为_53(a-b)/31__克2NaHCO3=Na2CO3+H20+CO2 固体质量减少168 106...
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