Scenario A Wilma was given the task to produce 78 grams of aluminum oxide, Al2O3. She had one tank of oxygen gas, O2 and 45 grams of solid aluminum, Al. She knew that if she heated the aluminum in the presence of the oxygen gas, she could produce the aluminum oxide. Since she had such little amount of aluminum, she decided to use as little of aluminum as she could to produce the 78 grams of aluminum oxide. She measured out 41.3 grams of aluminum and heated it with excess oxygen. Assume Wilma’s reaction went 100%. Wilma was very happy that her reaction produced the 78 grams.
Scenario B
Fred was given the task to produce 63 grams of aluminum bromide, AlBr3. He had a tank of bromine gas, Br2, and 3 grams of solid aluminum, Al. He knew that if he heated the aluminum in the presence of excess bromine gas, he could produce the aluminum bromide. Since he had such little amount of aluminum, he decided to use as little of aluminum as he could to produce the 63 grams of aluminum bromide. He measured out 2.89 grams of aluminum and heated it with excess bromine gas. Assume Fred’s reaction went 100%. Fred was very happy his reaction produced the 63 grams.