What is the potential energy of a spring that is compressed 0.65m by a 25kg block if the spring constant is 95n/m?

There are approximately 1 × 1022 molecules in a single medium-sized breath of air and approximately 1 × 1044 molecules in the atmosphere of the whole world. how many breaths of air are in the world's atmosphere? answer in units of breaths. 006 (part 2 of 2) 10.0 points if all the molecules from julius caesar's last dying breath are now thoroughly mixed in the atmosphere, how many of these on the average do we inhale with each single breath?