A sample is in the second half-life. What percent of the sample is stable at this point? A. 12.5%

B. 25%

C. 50%

D. 75%

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?

In which phase(s) do the molecules take the shape of the container?

What is the mass of 4 molecules of co2