How does changing the length of magnesim ribbon affect the temperature rise when added to hydrochloric acid?​

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?

Match the mixture with the substance// i really need on this guys (it’s a pic btw)

Give the orbital configuration of the phosphorus (p) atom.