What is the average atomic mass of Potassium if if 93.12% exists as potassium-39 (38.964 amu) and the rest exists as potassium-41 (40.961 amu)?

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?

Water is important for the of cells. a: size, shape, and temperature b: temperature, color, and odor c: color, odor, and size d: shape, temperature, and color

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?