Remaining Time: 33 minutes, 31 seconds. w Question Completion Status: QUESTION 9

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Remaining Time: 33 minutes, 31 seconds. w Question Completion Status: QUESTION 9 A 6.5 L sample of gaseous oxygen temperature 1 points save Answer the new volume is at a of 250 Kand a pressure of 1.0 atm. If the temperature is increased to 7so Kand the pressure is increased o50 m, be of the gas sample is QUESTION 10 1 points save Answer A sample of CH4 MM-16 o4 gmon effuses at a rate of 9.0 mol per hour at 35 c. which of the gases below wil effuse at approximately twice the rate under the same co (MM 28.01 mol He (MM 4.003 gWmo) O2 (MIM- 32.00 gWmo) F2 (MM 37.997 grmo0 0.5 points (Extra Credit) Save Answer QUESTION 11 True molecular theory assumes that attractive and repulsive forces between gas particles are stronger thanthose between gas particles and contaner walls. False MacBook Air

Explanation / Answer

(9)

Using eqn P1V1/T1 = P2V2/T2

V2 = (5.5*1/250)*(750/5) = 3.3 L

(10)According to Graham's law,

Rate1 / Rate2 = (M2/M1)1/2

Here M1 and M2 are Molecular weights

Since Rate2 = 2 * Rate1

So, M2 = 4 g/mol , so the correct answer is He.

(11)

False, Kinetic theory has no such assumption, rather it assumes that there are no forces amongst the gas particles and that clooisions of particles with container walls are elastic.

(12)

True, because the relation KE = (3/2)*k*T is independant of molecular mass, so all gases have same avg kinetic energy at a particular temperature

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