A sealed 22.4L flask contains pure O2 at STP. A second sealed flask contains CH4 at STP. Which of the following statements concerning the molecules in the flasks is/are true? Please provide explanation.

1. The average kinetic energy of the O2 molecules is greater than the av. kinetic energy of the CH4 molecules

2. The av. velocity of the CH4 molecules is greater than the average velocity of the O2 molecules

3. The volume occupied by the gas molecules is small relative to the total volume of the flasks

A) 1 only
B) 2 only
C)3 only
D) 2 and 3
E) 1, 2, and 3.

The image compares the arrangement of electrons in two different neutral atoms. a figure labeled atom q has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has six black spheres. to the left of this figure is another figure labeled atom p. atom p has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has seven black spheres. which of the following best explains the position of the two atoms in the periodic table? atom p has an estimated zeff of 7 and is therefore to the left of atom q, which has a zeff of 6. atom p has an estimated zeff of 7 and is therefore to the right of atom q, which has a zeff of 6. atom p has an estimated zeff of 5 and is therefore below atom q, which has a zeff of 4. atom p has an estimated zeff of 5 and is therefore above atom q, which has a zeff of 4.