Chapter 10 Notes—ALL ABOUT THE MOLE!

How do I calculate molar mass?

STEP 1:

STEP 2:

STEP 3:

STEP 4:

What is a mole?

TRY IT OUT!Find the molar masses of:

NaCl H2O

SO3 PCl3

MOLAR MASS!

EVERYTHING GOES THROUGH THE MOLE!

WHAT IS A TWO-STEP CONVERSION PROBLEM?

Calculate the number of molecules in 60.0 g NO2.

1st Conversion:

2nd Conversion:

So here’s an example!

Here’s the equation:

How many moles is 2.80 X 1024 atoms of silicon?

How many moles is 2.17 X 1023 particles of bromine?

How many moles are in 20 grams of NaCl?

Determine the volume in liters of 5 moles of hydrogen gas.

Another example:Calculate the volume, in liters, of 3.24 x 1022 molecules of Cl2 (STP).

LET’S PRACTICE!