Simulation:
Please head to – https://goo.gl/1AiTVt and complete Parts 1 and 2.
Part 1
1. Choose the ‘Molecules’ option
2. Select ‘Make Water’ in the top right corner
3. Use the simulation to answer the following questions.
a) How many H molecules are needed to make 6 H2O molecules?
b) If you combine 3 H2 molecules and 5 O2 molecules, what do you get after the reaction occurs?
c) What does it mean that some of the products are ‘Leftovers’?
Part 2
1. 
Select ‘Combust Methane’ in the top right corner
2. Use the simulation to answer the following questions
a) How many molecules of CH4 and O2 are needed to make 3 CO2 molecules?
b) If you combine 5 CH4 molecules with 3 O2 molecules, what do you get?