littlej4 littlej4

23-05-2018
Chemistry

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How many moles of helium gas are contained in a 4.0 L flask at STP

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vinyl50098 vinyl50098

23-05-2018

First, you convert liters to moles.
Usually you have to go to grams but this is STP.

Get moles directly by dividing the 4 by STP (22.4)
[tex] \frac{4}{22.4} =0.17857142857[/tex]
About [tex]1.8*10^{-1} [/tex] or 0.18 moles whichever your teacher prefers

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