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【单选题】
某同学用NaHCO 3 和KHCO 3 组成的混合物进行实验，测得如下数据(盐酸的物质的量浓度相等)，则下列分析推理中不正确的是(　　) 50 mL盐酸 50 mL盐酸 50 mL盐酸 m (混合物) 9.2 g 15.7 g 27.6 g V (CO 2 )(标准状况) 2.24 L 3.36 L 3.36 L
A.
盐酸的物质的量浓度为3.0 mol·L －1
B.
根据表中数据能计算出混合物中NaHCO 3 的质量分数
C.
加入混合物9.2 g时盐酸过量
D.
15.7 g混合物恰好与盐酸完全反应
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