A gas cylinder contains a mixture of compressed gases. The label reads:
21% oxygen, 78% nitrogen and 1% argon. When the cylinder is full the pressure is 6000 kPa.
What is the partial pressure of the oxygen?

Which of the following are sources of revenue for media companies? a. direct sales to producers b.advertising and subscriptions c. online purchase d. capital investments

Select all of the statements which are true. electrons are located in shells or orbits around the atom. electrons orbit slowly around the atom. electrons travel in one flat path around the nucleus of an atom. the valence of an atom is determined by the number of electrons in the atom's outermost shell.

Which one of the following substances would be the most soluble in ccl4? na2so4 h2o ch3ch2ch2ch2oh c4h10 hi