下列物质质量置于空气中,一段时间后,质量减小的是 A.碳酸钙 

下列物质质量置于空气中,一段时间后,质量减小的是

A.碳酸钙      B.氯化钠      C.浓盐酸      D.氢氧化钠

答案

C

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