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userdata-paziras-Chem101-Chap_05A

Examples 1 magnesium

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Unformatted text preview: R T Ideal Gas Equation Chemistry 101 Chapter 5 The Ideal Gas Law · To determine the value of R (Mo lar Gas Constant), consider exact ly 1 mo l o f gas at STP. P = 1.00 atm T = 273 K n = 1.00 mol V = 22.4 L R = ? P V = n R T P V (1.00 atm) (22.4 L) R = ¾¾¾ = ¾¾¾¾¾¾¾¾¾ n T (1.00 mol) (273 K) L . atm R = 0.0821 ¾¾¾¾ K . mol Examples: 0 1. What is the pressure in a 50.0 L tank that contains 3.03 kg of oxygen gas at 23 C ? V = 50.0 L 1 mol O2 n = 3,030 g x ¾¾¾¾ = 94.69 mol O2 32.00 g O2 0 T = 23 C + 273 = 296 K L . atm R = 0.0821 ¾¾¾ K . mol P = ? n R T P = ¾¾¾ V L atm )(296 K ) K mol = 46.0 atm 50.0 L (94.69 mol )(0.0821 P = P V = n R T 19 Chemistry 101 Chapter 5 Examples: 2. What is the densit y o f carbon dio xide gas (in g/L) at STP ? m d = ¾ V For 1 mol of CO2, at STP: m = 12.01 g + 32.00 g = 44.01 g V = 2...
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