Chemistry, 10.11.2020 06:50 djcloverman3593
Pure magnesium metal is often found as ribbons and can easily burn in the presence of oxygen. When 3.09 g of magnesium
ribbon burns with 8.75 g of oxygen, a bright, white light and a white, powdery product are formed.
Enter the balanced chemical equation for this reaction. Be sure to include all physical states.
equation:
What is the limiting reactant?
magnesium
oxygen
If the percent yield for the reaction is 90.3%, how many grams of product were
formed?
How many grams of the excess reactant remain?
Answers: 2
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A3.37-mg sample of protein was chemically digested to convert its nitrogen into ammonia and then diluted to 100.0 ml. then 10.0 ml of this solution was placed in a 50-ml volumetric flask and treated with 5 ml of phenol solution plus 2 ml of sodium hypochlorite solution. the sample was diluted to 50.0 ml, and the absorbance at 625 nm was measured in a 1.00-cm cuvette and found to be 0.486. for reference, a standard solution was prepared from 10.0 mg of nh4cl (molar mass = 53.49 grams/mole) dissolved in 1.00 l of water. then 10.0 ml of this standard was placed in a 50-ml volumetric flask, treated in the same manner as the unknown, and the absorbance found to be 0.323. finally, a reagent blank was prepared using distilled water in place of unknown, it was treated in the same manner as the unknown, and the absorbance found to be 0.076. calculate the weight percent of nitrogen in the protein.
Answers: 1
Chemistry, 22.06.2019 07:30
Plz mark brainliest 30 points 1) 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?
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Chemistry, 22.06.2019 21:30
How can the periodic table be used to predict the behavior of elements?
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Pure magnesium metal is often found as ribbons and can easily burn in the presence of oxygen. When 3...
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