A company that produces footballs uses a proprietary mixture of ideal gases to inflate their footballs. If the temperature of 210210 grams [g] of gas mixture in a 15-liter [L] tank is maintained at 470470 degrees Rankine [°R] and the tank is pressurized to 125125 pound-force per square inch [psi], what is the molecular weight of the gas mixture in units of grams per mole [g/mol]?

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?