Answer:
Its official chemical symbol is O, and its atomic number is 8, which means that an oxygen atom has eight protons in its nucleus
Explanation: I hope this helps!!!!!
PH + poH = 14
6.2 +poH = 14
poH = 7.8
Answer:
Balanced reaction: 
S is oxidized and N is reduced.
is the oxidizing agent and ZnS is the reducing agent.
Explanation:
Reaction: 
Oxidation: 
Balance charge:
...............(1)
Reduction: 
Balance H and O in acidic medium : 
Balance charge:
...............(2)
[
Equation-(1)] + [
Equation-(2)]:

Oxidation number of S increases from (-2) to (0) for the conversion of ZnS to S. Therefore S is oxidized.
Oxidation number of N decreases from (+5) to (+2) for the conversion of
to NO. Therefore N is reduced.
consumes electron from ZnS. Therefore
is the oxidizing agent and ZnS is the reducing agent.