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Three substances were studied in the laboratory, and the data in the table above were collected. Based on the data, which of the following shows the type of bonding in each substance?

A.选项

B.选项

C.选项

D.选项

A 1.0 L sample of a pure gas is found to have a lower pressure than that predicted by the ideal gas law. The best explanation for the observation is that the molecules of the gas

(A) have a combined volume that is too large to be considered negligible when compared to the volume of the container

(B) have a low molecular mass and therefore do not strike the container walls with as much force as expected

(C) are attracted to each other and do not exert as much force on the container walls as they would if they had no mutual attractions

(D) are attracted to the sides of the container and strike the container walls with more force than expected

The Maxwell-Boltzmann distributions of molecular speeds in samples of two different gases at the same temperature are shown above. Which gas has the greater molar mass?

(A) Gas A

(B) Gas B

(C) Both gases have the same molar mass.

(D) It cannot be determined unless the pressure of each sample is known.

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