What is the molar mass difference of CaCO3 and NH4NO2? Use 0:12, Ca:40, 0:16, N:14 A)100
B)80
C)10
D)20

Which of the following is a testable hypothesis? a. if i brush my teeth, i will get fewer cavities than if i don't brush my teeth. b. green toothpaste tastes better than blue toothpaste or red toothpaste. c. smart, careful, healthy people always brush their teeth. d. it's wrong to not brush your teeth before you have an important conversation with someone.

Nonpoint source pollution is difficult to control because it

Take a look at this dandelion. the yellow flower on the right is pollinated and the seeds on the left are transported by