PLS HELP! What are examples of a chemical reaction? Select all that apply.

a. O2(g) + O(g) → O3(g)
b. 2H2O(l) → 2H2(g) + O2(g)
c. CH4(g) + 2O2(g) → CO2(g) + 2H2O(g)
d. CO2(s) → CO2(g)

You have a sample of a gas that occupies a volume of 17ml at -111 degrees celsius. what volume does the sample occupy at 88 degrees celsius? show all work asap

Why does his teacher ask him to balance the equation by including the correct coefficient

Which statement is true about this reaction? 14n+1h 15o it is a practical source of energy on earth. it occurs only outside the solar system. its product is heavier than each of its reactants. it shows the critical mass of an element.