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:

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