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02-05-2017
Chemistry

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A mixture of Ar, He, and O2 has a total pressure of 1,015 kPa. Argon exerts a partial pressure of 152 kPa and Helium exerts a partial pressure of 305 kPa. What is the partial pressure of oxygen in this mixture?
a.1,472 kPa
b.558 kPa
c.863 kPa
d.710 kPa

Respuesta :

talonz6 talonz6

04-05-2017

This one is easy. It's just addition and subtraction. Add the partial pressure of Argon and the partial pressure of Helium:
152 kPa
+305 kPa
457 kPa

Next, subtract the result from the total pressure:

1015 kPa
- 457 kPa
558 kPa

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