1) calculate the density of 0 2 at STP (a) using theideal-gas law and (b) using
ID: 688551 • Letter: 1
Question
1) calculate the density of 02 at STP (a) using theideal-gas law and (b) using the molar volume and molar mass of02. how do the densities compare? 2) consider in firgure 1: a gas buret. if the level of themercury in the leveling bulb is lowered, what happens to the volumeof the gas in the gas buret. 1) calculate the density of 02 at STP (a) using theideal-gas law and (b) using the molar volume and molar mass of02. how do the densities compare? 2) consider in firgure 1: a gas buret. if the level of themercury in the leveling bulb is lowered, what happens to the volumeof the gas in the gas buret.Explanation / Answer
(1) We know PV = nRT = ( m / M ) RT P = ( m / V ) RT / M P = dRT / M Where P = Pressure of the gas = 1 atm d= density of the gas = ? R= gas constant = 0.0821 L atm / mol - K T= Temperature = 273 K M =Molar mass of O2 = 2 * 16 = 32 g Plug the values we have d = PM / RT = 0.04461 g / L Density = mass / Volume Molar mass of O2 = 2 * 16 = 32 g Molar Volume of O2 = 22.4 L So, density = 32 / 22.4 =1.4285 g / L (2) I am not visible about the figure.I think that when thelevel of the mercury in the leveling bulb is lowered then thevolume of the gas in the gas buret will increases.Related Questions
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