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An ideal gas occupies a volume of 2.2 cm3 at 20°C and atmospheric pressure. Determine the number of molecules of gas in the container. = 5.65e19

If the pressure is reduced to 2.6 10-11 Pa (an extremely good vacuum) while the temperature remains constant, how many moles of gas remain in the container?

2006-11-12 10:00:38 · 1 answers · asked by mastersource2005 5 in Science & Mathematics ➔ Physics

1 answers

use PV=nRT, the ideal gas law, and some algebra

n= number of moles present. Each mole contains 6.02 * 10^23 atoms

n=PV/RT and remember to convert everything to their proper units before doing the calculation ie change celcius to Kelvin etc

2006-11-12 10:06:18 · answer #1 · answered by SteveA8 6 · 0⤊ 0⤋