Question #443c2

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Answer 1 · 2017-03-30T20:19:24

Please see the explanation

Using Dimensional Analysis , we will need the conversion factors for Argon:

#(1" mole Ar")/(40" g Ar")# to go from grams to moles and #(40" g Ar")/(1" mole Ar")# to go from moles to grams

Dimensional Analysis starts by putting your given value over 1:

#(452" g Ar")/1#

Then you multiply by the conversion factor that will cancel the given units and replace them with the desired units:

#(452" g Ar")/1(1" mole Ar")/(40" g Ar")#

Please observe how the units cancel:

#(452cancel" g Ar")/1(1" mole Ar")/(40cancel" g Ar")#

You are only left with moles of Argon:

#(452" mole Ar")/40 = 11.3" mole Ar"#