How many pounds does a 5 gallon pail of water weigh?

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?

The pressure in a fluid is affected by which characteristics of that fluid

Identify the electromagnets with poles that are reversed from the electromagnet shown above