At what pressure and temperature is sand most likely to be compacted into sandstone?

Butane gas reacts with oxygen gas to give carbon dioxide gas and water vapor (gas). if you mix butane and oxygen in the correct stoichiometric ratio, and if the total pressure of the mixture is 390 mmhg, what is the pressure (in mmhg) of water vapor after the reaction is completed (temperature and volume do not change).

What physical property of gold makes panning a useful way to get gold from streams?

Which of the following volumes is the smallest? a) one microliter b)one deciliter d)one liter c)one milliliter