A flashlight emits both heat and light. Where do these forms of energy come from in the flashlight?

The mass has escaped into a gas which you can not see so the law stays true.

B.) falsehope this !

The higher the temperature, the increased rate constant for a reaction.(positive linear association)

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).