My Assignments it Mathway Math obs ng Jump to 10/15/2017 11:55PM10/100 O Assignm

Question

My Assignments it Mathway Math obs ng Jump to 10/15/2017 11:55PM10/100 O Assignment Information Sapling Learning Due Date Points Possibile: 100 Grade Category Homew 90 g of NHC is added to 15.9 g of water Calculate the molality of the solution Conversion between conce You can check your answer give up on any question You can keep trying to an until you get it right or give You lose 5% of the points a actempt at shat arwer O eTextbook Help With This Topic O Web Help&Videos; DELL F3 F4.F5 F6 FB 5 6 WE G H

Explanation / Answer

Molality = Number of moles of solute/Kg of solvent

Mass of NH4Cl = 8.90 g, Molecular weight of NH4Cl = 53.49 g/mol, Weight of solvent = 15.9 g = 0.0159 Kg

Number of mole of NH4Cl = Mass of NH4Cl/Molecular weight of NH4Cl = 8.90/53.49 = 0.16 mol

Molality = 0.16/0.0159 = 10 M

Molality of solution is 10 M

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