what is the answer? for the second part the question is: how many moles of solut
ID: 1057827 • Letter: W
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what is the answer?
for the second part the question is: how many moles of solute are in the solution?
D DA 17% D Fri 10:12 AM a e E Safari File Edit View History Bookmarks Window Help saplinglearning.com Everett Community College CHEM 162 Fall16 MosSER: HW 12 Molecu Weight Calculator (Molar Mass 55 PM A 26.7/30 /20/2016 11/4/2016 07:39 PM ebook Assignment Information Attempts Score Prin Calculator Periodic Table Available From 9/19/2016 12:00 A 00 13 Question 20 of 27 ncorrect Due Date: ncorrec 11/20/2016 11:55 00 Map 14 EA Sapling Learning Points Possible 30 00 Grade Category: Graded 15 When 3.82 g of a nonelectrolyte solute is dissolved in water to make 545 mL of solution at 29 °C, the Description: solution exerts an osmotic pressure of 917 torr 16 00 Policies: HW VAM What is the molar concentration of the solution? 00 17 Number You can check your answers. 100 18 M You can view solutions when you com up on any question. 00 19 Tools You can keep trying to answer each q How of solute are in the solution? 20 you get it right or give up. Number There is no penalty for incorrect answ 00 21 m o 22 eTextbook What is the molar mass of the solute? 00 23 O Help With This Topic Numb 00 24 g/ mol O Web Help & Videos 25 00 Technical Support and Bug Rep 00 26 Previous 3 Give Up & View Solution Check Answer Next Exit Hin 27 O 20 2016 Sapling Learning, Inc 39 about us Careers partners privacy policy contact us help terms of useExplanation / Answer
m = 3.82 g of nonelectrolyte
V = 545 mL
T = 29°C = 302 K
P = 917 torr
R = 62.3 torrL/molK
a)
apply osmotic pressure
P = M*R*T
M = P/(RT) = (917)/(62.3*302) = 0.0487387 mol /L
b)
how many... moles are in solution
M = mol/V
mol = MV = 0.0487387*0.545
mol = 0.0265 mol of soute
c)
Molar Mass =mass/mol = 3.82/0.0265 = 144.15 g/mol
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