Passage VI
Three experiments were done using CO2, krypton(Kr), or O2. For each gas:
1. A 3 L steel vessel was fitted with a cap that contained agas inlet valve and a pressure and temperature sensor.
2. Air was pumped out of the vessel until the pressuremeasured 0.00 torr.
3. The vessel was placed on a balance, and the balance wasreset to 0.000 g.
4. Some of the gas was added to the vessel.
5. When the gas in the vessel reached room temperature(22°C), mass and pressure were recorded.
6. Steps 4 and 5 were repeated several times.
The experiments were then repeated, except that a 6 Lvessel was used (see Figures 1 and 2).
31. Based on Figure 2, if 13 g of Kr had been added to the 6 L vessel, the pressure would have been:
Your Answer is
Correct Answer is C
Explanation
Look at figure 2, as the abscissa mass increases, the ordinate pressureuu increases. When the Kr mass is 10g, the pressure is close to 400, so when there are 13 g Kr, the pressure should be greater than 400;
But by calculating the slope of the Kr line segment, it can be estimated that it will not exceed 600