Chemistry, 19.11.2020 03:50 oliviakgobbell
At the south Texas nuclear power plant, uranium atoms are split in order to create heat. The heat is used to make steam, which turns a generator to make electricity. What energy changes takes place during this process?
A-Chemical energy to nuclear energy to electrical energy to heat energy
B-Mechanical energy to nuclear energy to heat energy to light energy
C-mechanical energy to heat energy to chemical energy to electrical energy
D-nuclear energy to heat energy to mechanical energy to electrical energy
Answers: 3
Chemistry, 21.06.2019 15:30
219 grams of iron (iii) oxide reacts with excess carbon according to the reaction equation shown below. fe2o3 + c โ fe + co2 after a scientist performs the chemical reaction they find the actual yield of iron to be 57.4 grams. calculate the percent yield of this chemical reaction.
Answers: 1
Chemistry, 21.06.2019 18:10
Which statements describe polyatomic ions? check all that apply. polyatomic ions have many charges. polyatomic ions have one overall charge. polyatomic ions repel other ions to form ionic bonds. polyatomic ions attract other ions to form ionic bonds. polyatomic ions are made up of only one type of atom. polyatomic ions are made up of two or more types of atoms.
Answers: 2
Chemistry, 21.06.2019 23:30
Write a paragraph that provides examples of each stage of volcanic activity, a description of the volcano, and facts about each stage.
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
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