1. Bellwork Friday
9.84 grams of aluminum is exposed to oxygen. How many moles of product are produced in this reaction?

2. Unit 8 ch 12 Part 2
Combination Problems

3. The mass from the periodic table!
A quick reminder…
Let’s quickly remind ourselves of just how awesome a mole is!
1 mole = ________________particles
1 mole = ________________ liters
1 moles = _______________ grams
6.02 x 1023
22.4
The mass from the periodic table!

4. Combination Calculations:
At STP, how many grams of oxygen are needed to produce 19.8 liters SO3 according to the balanced equation below?
2SO2 (g) O2 (g)  2SO3 (g)
19.8 L SO3
1 mol SO3
1 mol O2
32.0 g O2
22.4 L SO3
2 mol SO3
1 mol O2
STP
mol-mol ratio
GFM
14.1 g O2 =