The molar mass value you calculated is only approximately the true molar mass of the unknown sample (the two values are not identical). Suggest one possible source of experimental error that may have resulted in the deviation of your calculated value from the true value. (

Introductory Chemistry: A Foundation
9th Edition
ISBN:9781337399425
Author:Steven S. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Donald J. DeCoste
Chapter9: Chemical Quantities
Section: Chapter Questions
Problem 80AP: Using the average atomic masses given inside the front cover of the text, calculate the mass in...
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R = 0.0821 L.atm/mol.°K
Sample ID: A
Mass of the empty
Erlenmeyer flask +
rubber band + foil
Pressure
Temperature (°C)
Temperature (°K)
Mass of flask + vapor +
rubber band + foil
Mass of vapor (grams)
Volume of Flask
Calculated number of
moles (n)
Molar Mass (g/mol)
Average Molar Mass
(g/mol)
n=
107.2189
I atm
95°℃
368.15⁰K
108.209
0.9829
PV
RT
MM
Trial 1
=
330ml 0.33 L
1*0.33
0.0821*368.15
m
:0.010 met
0.982
0.010
=
98.29/mol
n=
Trial 2
107.2189
I atm
95.1°C
368.25°k
108.2969
1.0789
PV
MM.
=
103 g/mol
330ml=0.33L
1* 0.33
0.0821 368.25
m
n
.:0.010 mol
1.678
0.010
=107.89/mol
Transcribed Image Text:R = 0.0821 L.atm/mol.°K Sample ID: A Mass of the empty Erlenmeyer flask + rubber band + foil Pressure Temperature (°C) Temperature (°K) Mass of flask + vapor + rubber band + foil Mass of vapor (grams) Volume of Flask Calculated number of moles (n) Molar Mass (g/mol) Average Molar Mass (g/mol) n= 107.2189 I atm 95°℃ 368.15⁰K 108.209 0.9829 PV RT MM Trial 1 = 330ml 0.33 L 1*0.33 0.0821*368.15 m :0.010 met 0.982 0.010 = 98.29/mol n= Trial 2 107.2189 I atm 95.1°C 368.25°k 108.2969 1.0789 PV MM. = 103 g/mol 330ml=0.33L 1* 0.33 0.0821 368.25 m n .:0.010 mol 1.678 0.010 =107.89/mol
3. The molar mass value you calculated is only approximately the true molar mass of the
unknown sample (the two values are not identical). Suggest one possible source of
experimental error that may have resulted in the deviation of your calculated
value from the true value. (
81
Transcribed Image Text:3. The molar mass value you calculated is only approximately the true molar mass of the unknown sample (the two values are not identical). Suggest one possible source of experimental error that may have resulted in the deviation of your calculated value from the true value. ( 81
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