(2).【答案】 c 【解析】 根据短文中I am the ninth of the alphabet.应选 (3).【答案】 c 【解析】 根据短文中What's the chemical formula for water?可知H2O is the scientific name for water.应选C. (4).【答案】 a 【解析】 根据短文中A teacher was trying to teach a little girl to ...
(1)H2O:One day the science teacher asked the class,“What's the chemical formula for water?“A boy put up his hand, and the teacher said,”“Yes?”the boy said“HIJKLMNO”.“Are you trying to be funny?”asked the teacher angrily.“No, sir.”said the boy.“You said the formula ...
School stories:(1)H2O:One day the science teacher asked the class,“What’s the chemical formula for water?”A boy put up his hand,and the teacher said,“Yes?”the boy said“HIJKLMNO”.“Are you trying to be funny?”asked the teacher angrily.“No,sir.”said the boy.“You said the...
解答 71.B 细节理解题.根据小男孩的回答:"You said the formula was H to O."可知H2O应该是听上去和H to O一样,在这里是指发音一样.故选B.72.C 常识判断题.根据One day the science teacher asked the class,"What's the chemical formula for water?"并联系化学常识可知H2O就是水的化学分子式,所以...
Dry ice is a solid form of which gas? What is the scientific name for natural gas? What is the process to turn a solid into gas? What is the chemical name for water? Describe the transition from gas to liquid. What form of matter is vapor?
What is the chemical name for water? What is the percent ionic character of the H-I bond? Which element is found in most of the compounds in your body except for water? Is water a pure substance? Which two chemical elements are found in water?
Is evaporation of water a physical change or chemical change? Once the ice cube melts, what happens to the liquid water that it produces? What chemical reaction produces water? When water begins to boil, hot water at the bottom rises and replaces the cold water at the top. Heat is tran...
ΔH of H2O(l) = -285.8 * 6 = -1714.8 kJ/mole ΔH of Cl-(aq) = -167.2 * 4 = -668.8 kJ/mole This data is also assuming that the equation is currently under standard conditions (25 Celsius & 1 atm) You need to know what the original ΔH is for the other 2 compounds. ...
Step-by-Step Solution:1. Definition of Oxygenated Water: Oxygenated water is a type of water that has been infused with oxygen. It is often referred to as hydrogen peroxide (H2O2), which is a chemical compound
What is[Al(H2O)5(OH)2+]in a0.15Msolution ofAl(NO3)3that contains enough of the strong acidHNO3to bring[H3O+]to0.10M? Aluminum Nitrate: When aluminum nitrate is added to water, it becomes soluble. Aluminum nitrate ...