Choose the situation this is an example of heat transfer by radiation a.) an ice cube melts while you hold it in your hand. b.) hot soup rises to the top of the bowl, while cooler soup sinks to the bottom c,) coastal temperatures are cooler than temperatures in inland areas d,) the sun's energy is transferred through the vacuum of space to earth.

Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming natural gas. in the first step, nitrogen and hydrogen react to form ammonia: (g) (g) (g) in the second step, ammonia and oxygen react to form nitric acid and water: (g) (g) (g) (g) calculate the net change in enthalpy for the formation of one mole of nitric acid from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .