Consider the following data on some weak acids and weak bases:

acid base

Ka name formula Kb name formula

6.8x10-4 hydrofluoric acid HF 1.8x10-5 ammonia NH3

4.9x10-10 hydrocyanic acid HCN 1.7x10-9 pyridine C5H5N

Use this data to rank the following solutions in order of increasing pH. In other words, select a '1' next to the solution that will have the lowest pH, a '2' next to the solution that will have the next lowest pH, and so on.

solution

a.0.1 M NaCN

b.0.1M NH4Br

c.0.1M KF

d.0.1M KBr

Imagine that you’re getting ready to move to a new city. when people move, they are influenced by push factors and pull factors, and you have many reasons for your move. which of the following factors is an example of a pull factor? a. wanting to move because you’ve found a great new school somewhere new b. needing to move because there are not enough resources in your old hometown c. being forced to move because your old home is gone d. having to move because there are no jobs in your current hometown

How manyatoms of mercury are in 1.4214e+1 ml sample

Which of the following methods uses the decay of atomic particles in an object to find its exact age? a. fossil dating b. geologic dating c. radioactive dating d. relative dating