Hard water, which contains mg2+ and ca2+ ions, tends to form a ring in a bathtub due to its reaction with the soluble anions in soap. The formation of this insoluble material is an example of.

Solve this problem e=0+4m+p/6 (i also need to know what they are asking)

What was the main purpose in the green mile ?

You want to test the hypothesis that smoking cigarettes increases the risk of lung cancer. in your experiment, you take 100 people of various ages and genders for each of your groups. one group smokes. the other group does not smoke. the group that does not smoke is called the group