An acid has an acid dissociation constant of 2.8x10^-9. what is the base dissociation constant of its conjugate base?
2.8x 10^-23
3.6x10^-6
2.8x10^5
3.6 x10^22

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)

Do polar molecules have ionic bonds?

In order to complete this lab. you will need to be familiar with some common chemistry terms. complete the chemical change puzzle and list the relevant terms and their meaning below a.rectant b.product c.supernate