Chemistry, 22.02.2020 18:15 jaleewoodyard1
Natural gas is a fuel. How does a gas stove use the energy in natural gas to cook food?
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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.
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Chemistry, 22.06.2019 20:30
Which of the following is not true about the atomic model of substances?
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Chemistry, 22.06.2019 21:30
Under which circumstances are kp and kc equal for the reaction aa(g)+bb(g)⇌cc(g)+dd(g)?
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Chemistry, 23.06.2019 03:00
Abaker touches a pie right after taking it out of the oven. which statement best explains why the pie feels hot?
Answers: 1
Natural gas is a fuel. How does a gas stove use the energy in natural gas to cook food?...
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