5.97 g of copper and iron powders contain an equal number of atoms of each metal. How many cm3 of a 20.0% hydrochloric acid solution (ρ= 1.10 g/cm3) will react with the mixture of metals? Write the equations for all the reactions that occur?

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