Solution Y is 30 percent liquid X and 70 percent water. If 2 kilograms of water evaporate from 8 kilograms of solution Y and 2 kilograms of solution Y are added to the remaining 6 kilograms of liquid, what percent of this new solution is liquid X ?()
A.A
B.B
C.C
D.D
E.E
参考答案:C
解析:
稍加分析就可发现此题等同于问10公斤的Y溶液蒸发掉两公斤的水后的溶液中的液态物质X在整个溶液中所占的百分比,根据题意可得其所占的百分比为。