A500 liter volume of helium gas is at a pressure of 750 mm of hg and has a temperature of 300 k. what is the volume of the same gas at 600 mm of hg and 200 k?

How many moles are in 250 grams of tungsten (w)? * 4.4x10^23 moles 4.2x10^23 moles 0.7 moles 1.4 moles

If a molecule with a molecular formula of c13h18 is treated with an excess of h2 in the presence of finally divided pt metal under conditions required for maximum hydrogenation of the molecule to give a molecule with a formula c13h24, how many rings are in the molecule?

In what environment would mineral formation caused by high pressures and high temperatures most likely occur?