2H2 + O2 > 2H2O
2007-05-13 12:16:04 · 3 answers · asked by depreciation 1 in Science & Mathematics ➔ Chemistry
Quite a few actually. Take 2000 grams of water and divide by 18 to find the moles of water produced. The equation tells us that for EACH mole of water, 1/2 moles of oxygen are needed. At STP, each mole of oxygen actually used occupies 22.4 liters. So figure it out.
2007-05-13 12:21:37 · answer #1 · answered by cattbarf 7 · 0⤊ 1⤋
1 mL of water weighs 1 Gram. So 2 L of water weighs 2 kg (gotta love the metric system)
Divide 2000 g by the molecular weight of water to get the number of moles.
Divide by 2 because 1 mole of O2 produces 2 of H2O.
Use the ideal gas (PV=nRT) equation to figure out what volume it would occupy.
2007-05-13 12:26:52 · answer #2 · answered by nick1517 2 · 0⤊ 0⤋
All gases follow the ideal gas law, with equal molar quantitites at STP.
Just look at the coefficients
1 liter of O2 will make 2 liters of water
2007-05-13 12:19:23 · answer #3 · answered by reb1240 7 · 0⤊ 0⤋