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Safari File Edit View History Bookmarks Window Help { } 8296 [1, Tue 1:29 PM Roy Aldrich a E Do court survey Do community service Do college essays Mango for French Do mastering chemistry Government Quiz Economics Homework session.masteringchemistry.com CHEM 1411 Fall 2015 Help | Close Resources « previous 1 of 22 next » fer Post Lecture Homework Chapter 09 Exercise 9.22 with feedback File Submit survey for 10 hours of comm service Submit 12 hours at some place Pay $205 Part A Exercise 9.22 with feedback 0.45 mol of LiNO in 6.14 L of solution You may want to reference (-pages 302-306) section 9.2 while completing this problem Express your answer using two significant figures. Give Senior Picture deposit(S35) Windows Surface($1000) Save money for a car($2000 deposit) Get glasses($180) Get passport($110) Files Calculate the molarity of each of the following solutions molarity = Plan Javi's birthday stutf Submit My Answers Give Up Part B 73.6 g C2HsO in 2.48 L of solution Express your answer using three significant figures. odf molarity Submit My Answers Give Up Part C 12.59 mg KI in 102.5 mL of solution Express your answer using four significant figures. 29

Explanation / Answer

PART A

Molarity of

0.45 mol of LiNO3 and V = 6.14 L

M = mol/L = 0.45/6.14 = 0.0733 M

Part B

m = 73.6 g of C2H6O in 2.48 liter of solution

mol = 73.6 / 46 = 1.6

M = mol/V = 1.6 / 2.48 = 0.645

PART C

m = 12.59 mg of KI in V = 102.5 ml or 0.1025 L

MW KI = 166.0028

Mol = Mass/MW = 12.59*10^-3 / 166.0028 = 7.58*10^-5

M = mol/V = 7.58*10^-5 / 0.1025 = 7.4*10^-4

NOTE

consider posting all other equations in another set of q&A, we are not allowed to answer to multiple qeuestions in a single set

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