What is the volume of a 3.0 m solution of hydrochloric acid that contains 1.50 moles of solute?

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 mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

  the mississippians were considered to be  horticulturalists, which means they were