A40 liter cylinder of helium at a pressure of 100 atm and a temperature of 26°c is used to fill a balloon at 1.00 atm and 40°c. what is the volume of the balloon?

Asample of the male sex hormone testosterone, c19h28o2, contains 3.88×10^21 atoms of hydrogen.(a) how many atoms of carbon does it contain? (b) how many molecules of testosterone does it contain? (c) how many moles of testosterone does it contain? (d) what is the mass of this sample in grams?

Particle model to predict what will happen if a sharp object creates a hole in the soccer ball

A40 kilogram skier starts at the top of a 12 meter high slope. at the bottom, she is travelling 10 meters per second. how much energy does she lose to friction