The volume of carbon dioxide, CO2, gas created in the reaction below at STP occupies 66 L.
How many kilojoules are released in the reaction that produces this quantity of CO2?
HCl(aq) + NaHCO3(s) → H2O(l) + NaCl(s) + CO2(g) + 70kJ

Which factor is likely to impact the possible number of compounds? presence of unlimited number of elements in the periodic table the inability of atoms to align perfectly with other atoms the ability of all elements to react with every other element all elements being equally reactive