Astore sells 4 reams of paper for $23.08. which proportion can be used to find the cost of 12 reams of paper?

a. 12/23.08 = x/4

b. 23.08/4 = x/12

c. 4/12 = x/23.08

d. 4/23.08 = x/12

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.

Write the chemical formula for a compound that is made of an element from group 1 and an element from group 17

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.