50.0 mL of oxygen gas are mixed with 80.0 mL of hydrogen gas and ignited. Which of these two gases is in excess? What volume of the gas remains after the reaction?
2006-12-12 12:47:48 · 4 answers · asked by untilyoucamealong04 3 in Science & Mathematics ➔ Chemistry
The RXN
2H2 + O2 --> 2H2O
Notice that it takes two volumes of hydrogen to react with one volume of oxygen. In the problem stated above there is not enough hydrogen to accomidate all of the oxygen. Oxygen is in excess as only 40.0 mL of it will be used when all of the hydrogen has been consumed. Therefore there would be 10 mL of oxygen remaining.
2006-12-12 12:55:31 · answer #1 · answered by docrider28 4 · 0⤊ 0⤋
50 ml o2 + 80 ml H2 --- h2o2
2,23 mol 3,57 mol
reaction --- o2 use 2,23 mol so do the h2
h2 1,34 mol excess or about 30,016 ml left.
2006-12-12 20:54:16 · answer #2 · answered by fortman 3 · 0⤊ 0⤋
untilyoucamealong; I gotta tell you, I always thought that I was fairly bright, but some of the questions you folks ask absolutely baffle me. I haven't got a clue!!
2006-12-12 21:07:04 · answer #3 · answered by buzzwaltz 4 · 0⤊ 0⤋
I'm sure your book has the answer.
2006-12-12 20:49:30 · answer #4 · answered by Anonymous · 0⤊ 1⤋