Which of the following has the greatest mass?
a.1 mole of uranium (u)
b.1 mole of oxygen (o)
c.1 mole of sodium (na)
.1 mole of chlorine (cl)

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.

Consider the nuclear equation below. 239 > x + 4 he 94 2 what is x? 1.235 cm 96 2.243 u 92 3.235 u 92 4.243 cm 96

How can you use chemical equations to predict the products of the reaction you can carry out?