据报道，“中东呼吸综合征”病毒与“非典”病毒类似，加强自身防护是抵御病毒的重要方法．过氧乙酸（化学式为C2H4O3）是常用的一种消毒剂．请计算（直接写出答案）：（1）过氧乙酸（化学式为C2H4O3）的

题干

据报道，“中东呼吸综合征”病毒与“非典”病毒类似，加强自身防护是抵御病毒的重要方法．过氧乙酸（化学式为C₂H₄O₃）是常用的一种消毒剂．请计算（直接写出答案）：

（1）过氧乙酸（化学式为C₂H₄O₃）的相对分子质量；

（2）过氧乙酸中氢、氧两种元素的质量比．

上一题下一题 0.0难度选择题更新时间:2016-09-14 04:08:57

（1）76

（2）1：12

Welcome to Wenzhou Zoo! There are many different kinds of animals in the zoo．They come from different countries and they eat different food.

	Beibei is a cute panda．She is five years old from China. She is black and white．She likes eating bamboo and drinking water．
	Martin is a big elephant．He is ten years old with a long nose．He likes eating grass. People can teach* him to do much work to help them．
	Dudu is a monkey. He is two years old from Japan．He likes eating bananas and cakes．He often lives in the trees．
	Nick is a lion. He is strong．He is nine years old from England．He likes eating meat. He is very happy in the zoo．