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In a sample of air at STP, the partial pressure of nitrogen gas is PN, = 0.78 atm and the partial
pressure of argon gas is Par = 0:01 atm. Calculate the partial pressure of oxygen gas Po, at STP.
Ignore units and use the proper amount of significant figures.

Respuesta :

dsdrajlin

Answer:

0.21 atm

Explanation:

Step 1: Given data

  • Pressure of air (P): 1 atm (standard pressure)
  • Partial pressure of nitrogen (pNâ‚‚): 0.78 atm
  • Partial pressure of argon (pAr): 0.01 atm

Step 2: Calculate the partial pressure of oxygen

The air is a gaseous mixture formed mainly by nitrogen, oxygen and argon. The total pressure is equal to the sum of the partial pressures of the gases.

P = pNâ‚‚ + pAr + pOâ‚‚

pOâ‚‚ = P - pNâ‚‚ - pAr

pOâ‚‚ = 1 atm - 0.78 atm - 0.01 atm

pOâ‚‚ = 0.21 atm

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