Find density of volume of air?

Aaron

New member
2 measurements of pressure 17.094 m apart.

bottom = 692.5 torr
top = 745.1 torr

diff = 52.6 torr

convert to Pa and found mass in 17.094 column to be 715.7 kg

But how can i get the density, if I divied by 17.094 m^3 I get 41.87 kg/m^3 which seems really high.

Is this possible? or am I using the wrong volume? the measurements were taken inside of a stairwell not ourside if that makes a significant enough difference.
 
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