For a weak acid such as the side chain ε-amino group of a lysine residue in a protein, if the pka of that specific residue's ε-amino group is exactly 10.0, in an environment in which the ph = 9.0, what would be the ratio of base to acid?

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line