Answer:
In the presence of UV light, ethane will react with bromine in a substitution reaction. UV light is the condition under which the reaction will occur so it is written above the arrow in the chemical equation. As the reaction proceeds, the intensity of the re-brown colour of the bromine water decreases.
The bubbles are Carbon dioxide gas
Answer:
0.48 V
Explanation:
Usually in the cell notation, the left side shows oxidation. So,
Oxidation half reaction:
![E^o_{ox}=-E^o_{red}=-(-0.14\ V)=0.14\ V](https://tex.z-dn.net/?f=E%5Eo_%7Box%7D%3D-E%5Eo_%7Bred%7D%3D-%28-0.14%5C%20V%29%3D0.14%5C%20V)
Reduction half reaction:
![E^o_{red}=0.34\ V](https://tex.z-dn.net/?f=E%5Eo_%7Bred%7D%3D0.34%5C%20V)
![E^o_{cell}=E^o_{ox}+E^o_{red}= (0.14+0.34)\ V=0.48\ V](https://tex.z-dn.net/?f=E%5Eo_%7Bcell%7D%3DE%5Eo_%7Box%7D%2BE%5Eo_%7Bred%7D%3D%20%280.14%2B0.34%29%5C%20V%3D0.48%5C%20V)
A) can enter from the surroundings, but cannot escape to the surroundings