有相同质量的两份NaHCO3粉末,第一份加入足量盐酸,笫二份先加热

 有相同质量的两份NaHCO3粉末,第一份加入足量盐酸,笫二份先加热使其完全分解再加足量同浓度的盐酸,则两者所消耗的盐酸中氯化氢的质量比为(  )

A2:1          B1:1          C1:2          D4:2

答案

B

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