What is gold?
А.
two or more elements joined together chemically
B.
an element

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?

Your friend offers to show you an intrusive igneous rock. which of the following would you expect to see?

How many miles of water are produced if 5.43 mol pbo2 are consumed