Chemistry, 17.11.2020 21:10 chloelandry
Please draw a pair of geomtric isomers for C2H2F2 and label E or Z
Answers: 2
Chemistry, 21.06.2019 23:00
Select the correct answer. given: 2libr + ba β babr2 + 2li in this chemical reaction, 325 grams of barium (ba) react completely. how many moles of lithium (li) are produced? a. 1.18 mol b. 2.37 mol c. 4.73 mol d. 16.4 mol e. 32.9 mol
Answers: 2
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 06:00
Which of the following did jj thompson discover about atoms? a)an atom has an internal structure. b) atoms are tiny indivisible particles. c)electrons orbit the nucleus of an atom. d) the nucleus of an atom contains protons and neutrons.
Answers: 2
Chemistry, 22.06.2019 12:30
How many grams of magnesium metal will react completely with 8.3 liters of 5.5m hcl? show all work
Answers: 1
Please draw a pair of geomtric isomers for C2H2F2 and label E or Z...
History, 02.10.2019 12:50
History, 02.10.2019 12:50
History, 02.10.2019 12:50
Mathematics, 02.10.2019 12:50
Computers and Technology, 02.10.2019 12:50
Chemistry, 02.10.2019 12:50
Biology, 02.10.2019 12:50
Mathematics, 02.10.2019 12:50
English, 02.10.2019 12:50
Mathematics, 02.10.2019 12:50
English, 02.10.2019 12:50