A student adds 50 mLs of water to 20 mLs of a 5 M stock solution. What is the molarity of
the diluted solution? Remember, the final volume of the diluted solution (V2) includes the
stock solution and water.

altitude, density, pressure

air gets less dense the higher the altitude and also the air pressure is less as altitude rises.

c. 75.7

i think that is the right

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.