Chemistry, 13.05.2021 23:10 alexvane78
0.225L solution of H2CO3 is neutralized by 0.0880L of a 1.22 M Fe(OH)3 solution. What is the concentration of the H2CO3 solution?
Answers: 3
Chemistry, 22.06.2019 00:50
If a reactant was removed, did the new equilibrium system shift to make more reactants or more products?
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
Chemistry, 22.06.2019 05:50
Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.
Answers: 2
Chemistry, 23.06.2019 11:00
The lab procedure involves several factors, listed below some were variable and some were constant. label each factor below v for variable ot c for constant
Answers: 1
0.225L solution of H2CO3 is neutralized by 0.0880L of a 1.22 M Fe(OH)3 solution. What
is the concen...
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