What volume (L) of chlorine gas will react with excess sodium to form 210 grams of salt at STP? 2Na + Cl2 → 2NaCl

Which of these describes how heat is transferred by convection* a. sunlight travels through space without the aid of fluids or solids. b. warm air rises and takes the heat with it, eventually, it cools and sinks c. air at the equator rises and sinks at the poles. d. air molecules touch the warm ground, heating them up *not conduction