Aim What is a mole Do now How

Aim: What is a mole? Do now: How many apples are there in two dozen? How many pears are there in 4 dozen? Home work : Read pages 41 -42. Do the problems on page 42 # 44 -54. Copy the question and your answer.

A mole? Awwww how cute!

Mole… I guess its not that cute after all….

Wait this is a chemistry class!!!

A MOLE (mol) is just a word representing a quantity. What does dozen mean? Yep, it means 12. But 12 what? 12 steers 12 dinosaurs 12 flags

Just like the word dozen can stand for 12 things, the mole stands for 6. 02 x 1023 things. Things, however, are limited to Atoms Molecules Ions

To predict the amount of product from balanced equations!!! Look at the balanced equation and find the ratio of moles (coefficients) of O 2 to moles of CO 2 produced. What do we use the mole for?

Now what if I tell you that in the experiment we used 5 moles of O 2 and ask you how many moles of the CO 2 will be produced? • 1. Use your ratio from the balanced equation • 2. Set up your new ratio: 5: X 3. Cross multiply 5*1=2*X X = 2/5 moles of CO 2 produced Easy as 1… 2…. 3 Great! Its 2 to 1

Use the balanced equation to answer the following question: If you were given 10 moles of hydrogen how many moles of water did you make? If you were given 13 moles of oxygen how many moles of water did you make? Learning check