题目

To British people, Canadians may sound American. To Americans, they may sound British. Canadians themselves insist on not being identified with _________. A . neither B . both C . any D . either 答案：D13．已知1L水可吸收560L的X气体（标准状况），所得溶液的质量分数为29.8%，密度为0.9g/cm3，且X气体不与水发生反应，试计算：（1）X气体的摩尔质量；（2）该溶质的物质的量浓度．