Why is dirt or grease easier to wash off when using soap and hot water than when rinsing with just cold water? a. Soap is a surfactant.
b. Higher water temperature leads to an increased solubility.
c. both A and B
d. none of the above

Which of the following is not one of the steps in the scientific method a. hypothesize b. summarize c. analyze d. familiarize

Which statement is actually true about the relationship between activation energy and reaction rates? low activation energy barriers result in low rates. high activation energy barriers result in low rates. low activation energy barriers result in no reaction. high activation energy barriers result in no reaction.

Of element x has 22 protons, how many electrons does it have