Directions For Today's Assignment

Today you will be completing molarity exercises as a review. You will answer a few questions on the blog, and then finish the rest of the questions from Ch#8 in the book.

Molarity vs. Moles:
Remember that "molarity" is a measurement of the concentration of a solution (the number of moles of solute per liter of solution). The number of moles of a substance is like a relative weight of the substance. It takes 6.02 x 10^23 atoms of carbon to equal the average atomic mass of 12 g. There are 6.02 x 10^23 molecules in 1 mole of anything.
When you are "counting" the number of molecules, atoms, or ions, that it will take to equal its formula mass, you will be using the 6.02 x 10^23, but when you are just figuring out the formula mass for a substance you will use moles. Remember to label moles using either "moles" or "mol"-it is different from concentration or molarity, where you will use just "M." Some of you have gotten this confused.

Read the following posting and respond today please.