the reaction of aluminum with chlorine gas is shown 2Al + 3Cl2 -> 2AlCl3 based on this equation how many molecules of chlorine gas are needed to react with 30 aluminum atoms?

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?

How many moles of magnesium is 3.01 x10^22 atoms of magnesium?

Ahypothesis must be testable and falsifiable to be considered scientific a. trueb. false