Number of electron in O = 8
So, in O2 it would be: 8 * 2 = 16
So, your final answer is 16
Hope this helps!
Explanation:
A nuclear fission reaction is defined as the reaction in which a heavy nucleus splits into small nuclei along with release of energy.
The given reaction is 
Now, we balance the mass on both reactant and product side as follows.
235 + 1 =
236 = 234 + x
x = 236 -234
= 2
So, now we balance the charge on both reactant and product side as follows.
92 + 0 = 
92 = 96 - y
y = 4
Thus, we can conclude that there are 2 neutrons and 4 beta-particles are produced in the given reaction.
Therefore, reaction equation will be as follows.

Both A and B are the answer.
Answer:
So, the mole ratio between sodium and sodium oxide is 2:1=2
Explanation:
It's C anaerobic respiration