How many grams of N2O, nitrous oxide, are contained in 500 ml of the gas at STP?

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How many grams of N2O, nitrous oxide, are contained in 500 ml of the gas at STP?

2006-09-17 14:51:27 · 2 answers · asked by houstonman20042002 1 in Science & Mathematics ➔ Chemistry

2 answers

Molecular Mass of N2O= 14*2 + 16 = 28 + 16 = 44g
Now, 44g N2O gas occupies 22.4 L of volume at stp
Thus,
0.5L occupies =
44/22.4 * 0.5
= 0.98 g (aprox)

2006-09-17 15:42:46 · answer #1 · answered by Anonymous · 0⤊ 0⤋

It's PV = nrT where P is pressure, V is volume, n is the number of moles of gas, r is the 'universal gas constant' (which you can find in your book) and T is the temperature (in Kelvins)

Now you'll just have to figure out the gram-equivalency of nitrous oxide in grams per mole and you'll be all done âº

Doug

2006-09-17 22:07:18 · answer #2 · answered by doug_donaghue 7 · 1⤊ 0⤋