Answer is: c. CuSO4 + 2NaOH yields Cu(OH)2 + Na2SO4.
Copper atom has oxidation number +2, sulfur atom oxidation number +6, oxygen has oxidation number-2, sodium has oxidation number +1 and hydrogen has +1 on both side of chemical reaction, so elements did not change their oxidation numbers.
Answer:Chewing in the mouth breaks food into smaller pieces
Explanation: all you are doing is breaking down the food in your mouth
Answer:
6 moles of oxygen, or 3O2.
Explanation:
I would build a proportion for this:

If you change the subscripts it would change the reactants or products and then you would be solving a different formula, you would change what the chemical is