1. Active Learning Exercises
The gaseous hydrocarbon acetylene, , used in welders' torches, releases a large amount of heat when it burns according to the following equation:
How many moles of water are produced from the complete reaction of 64.0 g of oxygen?
How many grams of carbon dioxide are produced from the complete reaction of 78.0 g acetylene?
If the reaction in part c produces 186 g of carbon dioxide, what is the percent yield for the reaction?

2. Active Learning Checks
Acetylene, , used in welders' torches, burns according to the following equation
How many molecules of oxygen are needed to react with 23.6  acetylene?
How many grams of carbon dioxide could be produced from the complete reaction of the acetylene in part A?
If the reaction in part A produces 62.4  , what is the percent yield for the reaction?

3. Active Learning Checks
Consider the following unbalanced equation
How many moles of oxygen must react with 4.50 moles of aluminum ?
How many grams of aluminum oxide are produced when 50.7 g aluminum react?
When moles  aluminum is reacted in a closed container with 8.00 moles  oxygen, how many grams of aluminum oxide can form?
If 44.0 g  aluminum and 68.0 g oxygen undergo a reaction that has a 65.5  yield, what mass of aluminum oxide forms?

4. Warm-Up Question
Write the formula of the precipitate formed when solutions of the following compounds are mixed (Write both the molecular equation and the net ionic equation):
calcium chloride and sodium sulfate
silver nitrate and hydrochloric acid