A: I prefer western food .It’s a kind of healthy food.

B:      ?But western food is said to be high in sugar and fat .

A．Is that right

B．How do you know that

C．Do you really think so

D．Who told you that

过氧化氢的水溶液俗称双氧水，在放置过程中会缓慢分解，现有一瓶新制的双氧水，标签如图所示． 计算：

（1）若用这瓶双氧水来配制3%的医用双氧水1500g，需用这种双氧水的质量是多少克？

（2）若这瓶双氧水放置一段时间后，经实验测定，已缓慢分解放出96g氧气，求剩余溶液中溶质的质量分数．