What is a material that contains three elements joined in a fixed proportiona) mixtureb) solutionc) atomd) compound

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?

According to the tide table below what time of day will the highest tide occur? (2 pt) the highest tide will occur at

What is the subscript for oxygen in its molecular formula