An oxide of the metal, X ,contains 0.15 mole of it combined with 4.8g of oxygen. Find the simplest formula of the oxide

Asingle atom of an element has 21 neutrons, 20 electrons, and 20 protons. which element is it? ok o z

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?

2. how is heavy water different from normal water