Chemistry, 20.04.2020 22:18 Tcareyoliver
If 4.0 L of a gas at 20.0 oC is heated to 30.0 oC what is the new volume of the gas?
Answers: 1
Chemistry, 21.06.2019 20:10
What can be added to the examples section of each circle? endothermic: ice melting into water, and a heat pack becoming warm exothermic: a glow stick glowing, and fireworks exploding endothermic: ice melting into water, and an instant ice pack turning cold exothermic: fireworks exploding, and gasoline burning endothermic: a glow stick glowing, and a heat pack becoming warm exothermic: an instant ice pack turning cold, and ice melting into water endothermic: gasoline burning, and an instant ice pack turning cold exothermic: ice melting into water, and an instant ice pack turning cold
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
If 4.0 L of a gas at 20.0 oC is heated to 30.0 oC what is the new volume of the gas?...
Mathematics, 08.11.2020 21:20
Physics, 08.11.2020 21:20
Mathematics, 08.11.2020 21:20
Mathematics, 08.11.2020 21:20
Mathematics, 08.11.2020 21:20
Health, 08.11.2020 21:20
Chemistry, 08.11.2020 21:20
Mathematics, 08.11.2020 21:20
English, 08.11.2020 21:20
English, 08.11.2020 21:30
Mathematics, 08.11.2020 21:30
English, 08.11.2020 21:30
Social Studies, 08.11.2020 21:30
Mathematics, 08.11.2020 21:30
Mathematics, 08.11.2020 21:30