the answer is expressed in Liters
2006-12-10 07:22:02 · 2 answers · asked by raiderbball27 1 in Science & Mathematics ➔ Chemistry
Use the Ideal Gas Law: PV = nRT
where P is standard pressure (use 1.0 atmosphere, its easiest)
where V = your unknown volume (the answer will be in liters)
where n = the number of moles (you have to change 6.4g to moles by dividing by the molecular mass of O2 = 32 g/mol)
where R = the gas constant, 0.082 for the PVnT units we have
where T = temperature in Kelvin (C + 273)
2006-12-10 07:26:01 · answer #1 · answered by The Old Professor 5 · 1⤊ 0⤋
Use PV = nRT. The question asks you answer in STP. So T = 273K and P = 1atm. the value of R is I 0.0821 L*atm/mol K.
6.4g O * (1 mol O/15.99g O) = 0.400 mol oxygen. This is the value of n in PV = nRT
therefore, according to PV = nRT
1atm * V(litres) = 0.400 mol * 0.0821 L*atm/mol K * 273 K
=> Volume in litres = 8.96 litres of oxygen
2006-12-10 15:31:35 · answer #2 · answered by whatsnicknamemean 2 · 0⤊ 0⤋