es of CO₂ = (Mass of CO₂) ÷ (Molar Mass of CO₂) 0.781/44.01 = ar Volume = VSTP + Moles of CO₂ ent error = | 432/0.0177 = 24.406 L/mol experimental value-true value true value value = 22.4 L/mol 0.01779 22.4-24:406 | x 100 *100

Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter10: Solutions
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Problem 89QAP
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Moles of CO₂ = (Mass of CO₂) ÷ (Molar Mass of CO₂)
0.781/44.01 = 0.0177
Molar Volume = VSTP ÷ Moles of CO₂
Percent error = = 1
-432/0.0177 = 24.486 L/mol
experimental value-true value
true value
True value = 22.4 L/mol
22.4 - 24.406
22.4
| x 100
*100
= 8.955%
Transcribed Image Text:Moles of CO₂ = (Mass of CO₂) ÷ (Molar Mass of CO₂) 0.781/44.01 = 0.0177 Molar Volume = VSTP ÷ Moles of CO₂ Percent error = = 1 -432/0.0177 = 24.486 L/mol experimental value-true value true value True value = 22.4 L/mol 22.4 - 24.406 22.4 | x 100 *100 = 8.955%
Here's the first problem. You are doing an experiment in a laboratory that is 24 °C and 0.980
atm of pressure. You take a 0.480L flask that weighs 172.201g and fill it with CO2. After it is
filled it weighs 172.406g. Calculate the molar volume of the CO₂!
Vsip =
P₁V₁TSTP
T1PSTP
0.980x0.480* 273'
297 * 1
128.4192
297
= 0.432L
1.2000-480 =
0.5769
mass of 20₂ = 172.406-172-201 + 0.576 =2.0.7819
0-781/44.01 = 0.0177 mol Co₂
le volume 0.432/0.0177 = 24.486 L/mol
Now, we need to calculate the mass of the air that was inside the flask before we filled it with
CO₂:
Mass of air = (density of air)(volume of flask)
1.200 * 0.480 = 0.5769
Now, calculate the mass of the CO₂ by subtracting the mass of the empty flask from the mass of
the filled flask, adding the mass of air
19
Mass of CO₂ = (Mass of flask filled with CO₂) - (Mass of empty flask) + (Mass of air)
172-406 - 172.201 + 0.576 = 0.7816
Transcribed Image Text:Here's the first problem. You are doing an experiment in a laboratory that is 24 °C and 0.980 atm of pressure. You take a 0.480L flask that weighs 172.201g and fill it with CO2. After it is filled it weighs 172.406g. Calculate the molar volume of the CO₂! Vsip = P₁V₁TSTP T1PSTP 0.980x0.480* 273' 297 * 1 128.4192 297 = 0.432L 1.2000-480 = 0.5769 mass of 20₂ = 172.406-172-201 + 0.576 =2.0.7819 0-781/44.01 = 0.0177 mol Co₂ le volume 0.432/0.0177 = 24.486 L/mol Now, we need to calculate the mass of the air that was inside the flask before we filled it with CO₂: Mass of air = (density of air)(volume of flask) 1.200 * 0.480 = 0.5769 Now, calculate the mass of the CO₂ by subtracting the mass of the empty flask from the mass of the filled flask, adding the mass of air 19 Mass of CO₂ = (Mass of flask filled with CO₂) - (Mass of empty flask) + (Mass of air) 172-406 - 172.201 + 0.576 = 0.7816
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