题目

As the pace of life continues to increase, we are fast losing the art of relaxation. Once you are in the habit of rushing through lift, being on the go from morning till night, it is hard to slow down. But relaxation is essential for a healthy mind and body.                               Stress is a natural part of everyday life and there is no way to avoid it. In fact, it is not the bad thing it is often supposed to be. A certain amount of stress is vital to provide motivation and give purpose to life. It is only when the stress gets out of control that it can lea取锌、铜的混合物8g与154.7g稀硫酸恰好完全反应，称得剩余物质的总质量为162.5g。请计算：（1）产生氢气的质量是多少？（2）混合物中铜的质量是多少？