C and D C) what is the theoretical molar volume of the gas at 742 torr and 19 C?
ID: 898941 • Letter: C
Question
C and D C) what is the theoretical molar volume of the gas at 742 torr and 19 C? D) calculate the percent error in this experiment. Oxygen from the decomposition of KCIOs is collected in an eudiometer.If the mass of the KCIO, decomposed is 0.234 grams, how many moles of O2 were formed? 2. 2KCIO3 2KCI + 302 0.00 , 0019 2.365mas O, Produce d 3. a) In a similar experiment, 0.00307 moles of O2 is collected at 19°C and a partial pressure of 720 torr. The volume is measured to be 74.1 mL. What would this volume be at room conditions, 19°C and 742 torr? Pvn RT (720.0·0741) . (742 )V1 a 2 292 b) Continuing with the same experimental results, calculate the indicated molar volume at room conditions, 742 torr and 19°C 32, 251 30.9in :125. IL c) What is the theoretical molar volume of the gas at 742 torr and 19C? d) Calculate the percent error in this experiment.Explanation / Answer
(C): Given temperature, T = 19 DegC = 19 + 273 = 292 K
Pressure, P = 742 torr =742 torr x( 0.00131579 atm / 1 torr) = 0.9763 atm
Number of moles, n = 1 mol
Applying ideal gas equation
PV = nRT
=> V = nRT/P = (1molx0.0821 L.atm.mol-1K-1x292K) / 0.9763 atm = 24.55 L
Hence theoritical molar volume = 24.55 L
(d): Percent error in the experiment = [(25.10L - 24.55 L) / 24.55]x100 = 2.24 %
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