Aqueous lithium hydroxide is used to purify air in space crafts and submarines because it can absorb the carbon dioxide that is exhaled: 2 LiOH(aq) + CO 2 (g) → Li 2 CO 3 (aq) + H 2 O(l). What volume of carbon dioxide can be removed from the cabin of a
spacecraft, which is kept at 25°C and 0.97 atm, if the gas reacts with a mass of 15.0 g of lithium hydroxide?

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?