1. Describe the pH scale. (What is the lowest value? Highest value? Neutral value? Which

end is acid? Which end is base?)

How many moles are in 6.73 x 10^24 atoms of Cu?

Which type of mixture is formed when one substance dissolves into another and fills the spaces between other kinds of molecules?

How do the hazards from a quiet eruption differ from those of an explosive eruption?

Which atom in each pair has the larger atomic radius Li or K?

Different isotopes of a particular element contain the same number of

Human muscle stores sugars in the form of

How much heat is needed to raise the temperature of 75 g of a substance by 15 C when the specific heat is 0.92 J/g-C?

A nitric acid solution flows at a constant rate of 5L/min into a large tank that initially held 200L of a 0.5% nitric acid solution. The solution inside the tank is kept well stirred and flows out of the tank at a rate of 10L/min.

How many molecules are in 237g (about a cup of water)

3. A compound was analyzed and found to contain 9.8 g of nitrogen, 0.70 g of hydrogen, and 33.6 g of oxygen. What is the empirical formula of the compound?