A technician produced H_2 gas by reacting zinc (Zn) with sulfuric acid (H_2SO_4).The reaction was : 2Zn (s) + H_2SO_4 (aq). —>Zn_2SO_4 (aq) + H_2. He collected the hydrogen in a flask by water displacement. Atmospheric pressure was 737.2 torr and room temperature was 25.0^degree . What was the pressure of H_2 in the flask?

Kelly has come up with an explanation for why her sister is sometimes in a good mood and other times in a bad mood. she speculates that it is based on the hours of sleep her sister got the previous night. this explanation for her sister's behaviors is an example of a(n)

What properties would have caused early researchers to name hydrogen "inflammable air”

Idid a lab for chemistry where we put nails in a copper (ii) chloride solution. 1. why did the reaction stop? which reactant was used up? how do you know? 2. describe what was happening to the atoms of iron and copper during the reaction. what is this type of reaction called? 3. what would happen to the ratio of copper to iron if you had placed more nails in the beaker? if you had let the reaction go for less time? 4. what is the accepted ratio of copper atoms to iron atoms in this reaction? account for differences between your experimental value and the accepted value. write the balanced equation for the reaction.