A student uses visible spectrophotometry to determine the concentration of CoCl2(aq) in a sample solution. First the student prepares a set of CoCl2(aq) solutions of known concentration. Then the student uses a spectrophotometer to determine the absorbance of each of the standard solutions at a wavelength of 510nm and constructs a standard curve. Finally, the student determines the absorbance of the sample of unknown concentration. A wavelength of 510nm corresponds to an approximate frequency of 6×1014s−1 . What is the approximate energy of one photon of this light? 9×1047J 9×1047J A 3×1017J 3×1017J B 5×10−7J 5×10−7J C 4×10−19J 4×10−19J D Submit
Answers: 2
Chemistry, 22.06.2019 12:30, Svetakotok
Suppose you wanted to make 100 grams of water. what is the molar mass of water (h2o)?
Answers: 2
Chemistry, 23.06.2019 01:30, koggebless
The solubility of barium nitrate is 9.02 g/100 g h2o at 20°c. a 15.2 g sample of barium nitrate is added to 200.0 g of water at 20°c. is the solution saturated, unsaturated, or supersaturated? a. unsaturated b. saturated c. supersaturated
Answers: 1
Chemistry, 23.06.2019 03:30, nikkio4
In chemistry, the type of an atom (what element it is) is determined by: a) the number of protons it contains in its nucleus. b) the number of neutrons it contains in its nucleus. c) the number of protons it has in a cloud around the nucleus. d) the number of neutrons it has in a cloud around the nucleus. e) the number of electrons it exchanges with its neighbors.
Answers: 1
Chemistry, 23.06.2019 05:00, andrwisawesome0
Match each term to its description. match term definition excess reactant a) reactant that can produce a lesser amount of the product limiting reactant b) amount of product predicted to be produced by the given reactants theoretical yield c) reactant that can produce more of the product
Answers: 3
A student uses visible spectrophotometry to determine the concentration of CoCl2(aq) in a sample sol...
Biology, 12.01.2021 01:00
Mathematics, 12.01.2021 01:00
Mathematics, 12.01.2021 01:00
English, 12.01.2021 01:00
English, 12.01.2021 01:00
Mathematics, 12.01.2021 01:00
Mathematics, 12.01.2021 01:00