I need help with two questions.

1.)Explain whether a chemical formula can describe a solution

Number two will be in a picture .it is underneath the two box’s.

I'm pretty sure its c

The answer is a. stable, hope i ya

Answer is: hydrogen is being oxidized.chemical reaction: co₂ + h₂ → co + h₂o.oxidation half reaction: h₂ → 2h⁺ + 2e⁻.reduction half reaction: c⁺⁴ + 2e⁻ → c⁺².oxidation is increase of oxidation number, hydrogen change oxidation number from neutral charge (in molecule of hydrogen) to oxidation number +1 (in water).