How many molecules are ther un a) 1.00L and b) 1cm3 of a gass at STP (0°C and pressure at 1atm)
2006-09-20 11:21:25 · 3 answers · asked by deyi32 1 in Science & Mathematics ➔ Physics
At STP, one "mole" of an ideal gas consists of a number of molecules equal to Avogadro's number (a well-known number that you should memorize; if you don't know it, use Google to find it, since I don't want to give you things that you should get for yourself).
So one liter of a gas has that number of molecules divided by 22.4.
One cm3 of gas is a fraction of a liter. (Again, you need to figure out what that fraction is.) If you multiply the answer from part a by this fraction, you'll have the answer to part b.
2006-09-20 11:28:14 · answer #1 · answered by actuator 5 · 0⤊ 0⤋
6.02 x 10^23 molecules, the standard number in chemistry
2006-09-20 18:26:22 · answer #2 · answered by Steve 1 · 0⤊ 0⤋
1) 0.044615883 /1000 * avogadro's # = 2.69*10^19
2) 0.044615883 / 1000000 * avogadro's # - 2.69*10^16
2006-09-20 18:28:56 · answer #3 · answered by Radiosonde 5 · 0⤊ 0⤋