Which is a chemical property of hydrogen? A.
It is a light gas.
B.
It is a combustible gas.
C.
It is a colorless gas.
D.
It has a boiling point of -252.87°C.
E.
It is a good conductor of electricity.

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?

200. ml of 3.00 m nacl solution is diluted to a final volume of 500. ml. what is the molarity of the final solution?

How have the greenhouse gasses increased from the year 2000 to 2018