Answer:
The correct answer is option D.
Explanation:
Step 1: 
Step 2: 
Overall reaction can be determined by adding all the reactions of mechanism:

Reactants in an overall reaction = 
Products in an overall reaction = 
According to question , the role of oxygen gas is product.
Is 320 g per 100 g of water.
Because it is made up of sodium, a metal, and carbon, a nonmetal.
Hope I helped ♡
A bag of soil will weigh in kilograms