what is the chemical formula of the compound如题

what is the chemical formula of the compound如题 what is the character of the chemical 怎么翻译? What is the difference between a chemical reaction and a physical change? The chemical s___ for water is H2O. The mass of 0.02mol of a substance is 0.88g1.what is the molar mass of this substance?2.what is its chemical formula? What is a chemical property?Give four examples 本人在国外学上高中,化学遇到难题了,What are the differences among chemical bonds ,chemical bondand chemical bonding? Which of the following is a function of the plasma membrane?Helps control what goes in or out of a cell.Converts light energy to chemical energy Is the genetic control center of the cell Converts food molecules into ATP Much of what is known of the mechanisms机制 by which chemical reactions occur has been learned thro这个句子的中文意思Much of what is known of the mechanisms by which chemical reactions occur has been learned through kinetic studies employi 高分求一道GMAT数学题.The rate of a chemical is directly proportionate to the square of A and inversely to B,if B increase 100%,what is the change of percentage of 是什么化学物质让大脑产生兴奋What brain chemical is associated with pleasure? 请教二道化学题（AP）(1)What is a reaction mechanism and how does it differ from a balanced chemical equation?(2)Define the following general types of chemical reactions:a.Addition;b.Elimination; b-1.Beta Elimination; b-2.Alpha Elimination; 初中英语一道单项选择it smells terriible.what has happended here?there is much waste gas ( )from the chemical factoryA. pouring B.pouredthere前面还有一个look。不知道有没有影响 化学名称（英文）Chemical name for titin ( I believe that you guys can find out what it is and paste it in the answer box )要的是全名哦… 英语以动名词的适当形式填空What's their reason for_________(cancel) the English evening?A common example of chemical change is________(rust).Helen's_________(be) late made me angry.My watch is broken. It needs_________.(repair)The________ The gas produced from this chemical factory is poisnonous啥意思 英语翻译who is most at risk from the hazardous effects of thi chemical? 1；name the two chemical elements that make up of Earth's atmosphere.2:in which layer of the atmosphere do people live?3:what is atmospheric pressure?4:what does a barometer measure?5:what term is used for the amount of water vapour carried in air?6