what is answer part A,B mework Se Mixture of Gases Resources « previous 17 of 19

Question

what is answer part A,B

mework Se Mixture of Gases Resources « previous 17 of 19 | ± Mixture of Gases Part A A mixture of HeArXeatmHeatmAratmXe Learning Goal To use partial pressure in gas law calculations In a mixture of gases, the total pressure of the gas individual gases. For example, if you have a mixture of Express your answer to three significant figures and include the appropriate units Hints is equal to the sum of the partial pressures of the helium at 2 atm atm atm atm N2O2Heatm N202atm atm He Submit My Answers Give Up Rearranging this equation, the partial pressure of He Incorrect; Try Again; 5 attempts remaining 1.00 atm-0.70 atm-0.25 atm = Figure 1 of 1 Part B A volume of 18.0 L mole N2 mole O2 He C atm Express your answer to three significant figures and include the appropriate units Hints mass of He Value Units Submit My Answers Give Up

Explanation / Answer

According to the question;

As we know that;

A)

Partial pressure of Xe = 2.40 - (0.2 + 0.45)

= 1.75 atm

Then,

B)

Total moles = PV/RT

So,

= 1 x 18/0.08205 x 273

= 0.8036 moles

Then,

Moles of He = 0.8036 - (0.250 + 0.250)

= 0.3036 mols

Grams of He = 0.3036 x 4

= 1.214 g

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