A gas has a temperature of 21 degrees C, and a volume of 3.5 liters. If the volume is raised to 4.0 liters and the pressure is not changed, what is the new temperature of the gas?

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?

Nuclear decay is the spontaneous decay of one element into a. an x-ray b. a ray of light c. another element

Chris is about to do an experiment to measure the density of water at several temperatures. his teacher has him prepare and sign a safety contract before beginning the experiment. which term is mostlikely part of the safety contract