PLEASE HELP ASAP! I WILL MARK AS BRAINLIEST

Question:
If 99.0% of the weak acid HX stays un-ionized in 1.0 M aqueous solution, what is the Ka?

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li

This statement about matter and its behavior is best classified as a

As light moves from one material into the next, which of the following affects how much the light waves will refract, or bend? angle at which the ray strikes the medium color of the material density of the material temperature of the light wave