Please answer q1&2 for me ASAP

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains

To find the enthalpy of a reaction in the lab, you measured the of the reactants and the change during the reaction.

Five different substances are given to you to be dissolved in water. which substances are most likely to undergo dissolution in water? check all that apply. view available hint(s) check all that apply. sodium fluoride, naf octane, c8h18 propanol, ch3ch2ch2oh potassium iodide, ki benzene, c6h6