13 Water is added to anhydrous copper(II) sulfate.What happens during the reaction? B A The copper(II) sulfate turns blue and the solution formed gets colder. B The copper(II) sulfate turns blue and the solution formed gets hotter. C The copper(II) sulfate turns white and the solution ...
What happens during an acid–base reaction? An acid–base reaction is a type of chemical reaction that involves the exchange of one or more hydrogen io
A. They turn blue B. They disappear C. They become larger D. They turn yellow 相关知识点: 试题来源: 解析 B。解析:文中“As the reaction proceeds, we can observe several phenomena. The iron filings gradually disappear...”明确指出铁屑在反应中逐渐消失。反馈...
When iron rusts, it is a chemical change. What happens during this process? A. The color remains the same. B. No chemical reaction occurs. C. A new substance is formed. D. The mass of iron decreases. 相关知识点: 试题来源: 解析 C。铁生锈是化学变化,在这个过程中会形成新物质。A ...
(c)What happens to the speed of the reaction when(i) smaller pieces of zinc are used?goes faster /more hydrogen given off per minute /more gas given off per unit time /less time for same amount of gas...I per unit time / less time for same amount of gas_.. [1](ii) some ...
B. It breaks down into two or more simpler substances. C. One element replaces another element in it. D. Two compounds E. xchange ions. 相关知识点: 试题来源: 解析 B。解析:分解反应中,一种化合物分解成两种或更多更简单的物质。A 是组合反应,C 是置换反应,D 是复分解反应。反馈 收藏 ...
Re: What happens in this reaction? « Reply #2 on: August 05, 2020, 07:51:10 AM » When confronted with a problem like this, I sometimes count carbon atoms and assign oxidation numbers. Logged Print Pages: [1] Go Up « previous next » Sponsored Links Chemical...
When a catalyst is added to a reaction at equilibrium, what happens to the equilibrium position? A. Shifts to the right B. Shifts to the left C. No change D. Can't determine 相关知识点: 试题来源: 解析 C。解析:催化剂只能改变反应速率,不能改变平衡状态,所以平衡位置不变。
During a chemical reaction, the atoms of the original substances gain, lose or share their electrons with those of the substances with which they are reacting. The reaction creates new substances made up of a new combination of atoms and a different configuration of electrons. ...
5.The professor describes what happens during anaphylactic shock. Indicate whether each sentence below is a step in the process. For each sentence, click in the correct box. Yes No The chest feels tight and breathing is difficult. The face and throat begin to swell. Fatty particles attach ...