Chemistry, 12.12.2020 17:00 shaking9302
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.
Answers: 3
Chemistry, 21.06.2019 17:00
Look at the reaction below: ca(hco3)2 --> caco3 + co2 + h2o first, balance the reaction. once balanced, use dimensional analysis or another method to find out how many moles of carbon dioxide will be produced if we start with 16.5 moles of calcium bicarbonate (calcium hydrogen carbonate). = mol of co2 number needs to be reported to three significant figures.
Answers: 1
Chemistry, 22.06.2019 09:00
Plz mark brainliest 30 points1) find the momentum of a 12 kg snowball that is rolling with a velocity of 9 m/s.2) an 8 ball with a mass of .5 kg is sitting at rest. it is hit by the cue ball (1 kg) traveling at 2.5 m/s. if the cue ball is at rest after the collision, how fast is the 8 ball traveling after the collision? 3) two football players are running toward each other. if the offensive player is 75 kg and is running 8 m/s, how fast must the 60 kg defensive player run in order for the two players to hit and stop?
Answers: 1
Chemistry, 22.06.2019 17:30
Observation and experimentation have led many scientists to accept a theory about the origin of the universe. this theory is called the big bang theory. scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. what makes this a scientific theory? (2 points)
Answers: 2
Chemistry, 22.06.2019 19:30
Which liquid (h2o, h2o + soap, or h2o + salt) has the strongest cohesion and adhesion? (need now plz)
Answers: 1
Scenario A
Wilma was given the task to produce 78 grams of aluminum oxide, Al2O3. She had one tank...
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