Chemistry, 17.12.2019 01:31 ChloeLiz7111
Given the balanced equation below, calculate the moles of aluminum that are needed to react completely with 28.7 moles of feo. you must show all of your work. 2al + 3feo --> 3fe +al2o3
Answers: 1
Chemistry, 22.06.2019 05:30
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
Using data from seismic waves, geologists have learned that earth’s interior is made up of several
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Chemistry, 22.06.2019 13:30
Table sugar completely dissolved in water is an example of a?
Answers: 1
Chemistry, 22.06.2019 21:00
Write a balanced equation showing the formation of copper (ii) nitrite from its elements
Answers: 1
Given the balanced equation below, calculate the moles of aluminum that are needed to react complete...
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