Is the delta H rxn for the reaction C(s) + O2(g) --> CO2(g) the same as the delta H f for CO2(g)?

How does the atmosphere to make earth livable? check all that apply. causes the seasons contains oxygen provides warmth creates important nutrients blocks harmful energy from the sun plz like !

What can be done to make a solid solute dissolve faster in a liquid solvent?

How many grams are in 1.75 mile of carbon