Can someone help me with please?

At room temperature what happens to the average kinetic energy of the molecules of a solid, liquid, and a gas

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer