A box of gas contains a mixture of two different gases, shown in the figure as b

Question

A box of gas contains a mixture of two different gases, shown in the figure as blue molecules and red molecules. The temperature and pressure in the box are measured at STP (T = 300 K and p = 1 atmosphere). The blue molecules have 4 times the mass of the red molecules, but there are equal numbers of each kind in the box. The simulation has been running long enough at this time so that the all the measurements have stabilized. (Gravity is turned off in the simulation.)

1. Which molecules contribute more to the pressure measured by a meter in the wall of the box?

2. Which molecules are moving faster?

A box of gas contains a mixture of two different gases, shown in the figure as blue molecules and red molecules. The temperature and pressure in the box are measured at STP (T = 300 K and p = 1 atmosphere). The blue molecules have 4 times the mass of the red molecules, but there are equal numbers of each kind in the box. The simulation has been running long enough at this time so that the all the measurements have stabilized. (Gravity is turned off in the simulation.)

1. Which molecules contribute more to the pressure measured by a meter in the wall of the box?

1. The blue molecules
2. The red molecules
3. They contribute equally
4. You cannot tell from the information given

2. Which molecules are moving faster?

1. On average, the blue molecules are moving twice as fast as the red
2. On average, the red molecules are moving twice as fast as the blue
3. On average, the blue molecules are moving faster than the red but not twice as fast
4. On average, the red molecules are moving faster than the blue but not twice as fast
5. You can

Explanation / Answer

1.

2.On average, the red molecules are moving twice as fast as the blue

3

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