Chemistry, 29.03.2021 23:10, hellodarkness14
Research an element and write a creative story about it.
Example: One sunny day Hydrogen was happily skipping lightly on its feet, in the park. It then met oxygen and they had a huge explosion.
Hydrogen hopes in the future it can be used more for fuels in cars to help the environment from climate change.
Answers: 2
Chemistry, 21.06.2019 23:00, slugmilk1090
The agent of mechanical weathering in which rock is worn away by the grinding action of other rock particles is call
Answers: 1
Chemistry, 22.06.2019 05:30, MansellS5529
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 18:00, liddopiink1
An object displaces 652 ml of water. the volume of the object is: 0.652 cm³ 6.52 cm³ 65.2 cm³ 652 cm³
Answers: 3
Research an element and write a creative story about it.
Example: One sunny day Hydrogen was happil...
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Chemistry, 30.06.2019 22:00