Look and answer.

1. A: What did Lucy do yesterday?

    B:                                .

2. A: What did John do last weekend?

     B:                               .

3. A: Did Ben play basketball yesterday?

    B:                               .

4. A: What's the matter with you?

    B:                               .

5. A: What's Jack doing?

     B:                              

将0.65克Zn粉加入到200ml的足量CuSO₄溶液中，锌粉完全溶解，（不考虑反应前后溶液体积的变化）求：

（1）析出铜的物质的量；  

（2）生成ZnSO₄的物质的量及其物质的量浓度；  

（3）溶液的质量是增加了还是减少了，变化了多少克，说明理由．