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Explain if a solution of compound S (MW = 200) w a known ε of 20,000 at λmax of 300 nm gave an absorbance of 1 in 1cm cell, explain how many mg of compound S was present in 1 mL of the analyzed solution?
What happens to the body that allows it to compensate (over this period of time) for the reduced pressure , so that the athletes will not become lightheaded?
A 6.11g sample of a Cu-Zn alloy reacts with HCl acid to produce hydrogen gas. If the hydrogen gas has a volume of 1.26L at 22 degreesC and 728 mmHg, what is the percent of Zn in the alloy
Calculate the work w when 5.3 litre of an ideal gas at an initial pressure of 9.3 atm is expanded or compressed isothermally to a final volume of 9.3 litres reversibly
Use the Frost Circle to draw the energy levels of the Pi molecular orbitals for this ion, show the electronic configuration and explain why the ion is aromatic.
To make strawberry jam, crushed strawberries and sugar are mixed in a 45:55 mass ratio, and the mixture is heated to evaporate water until the residue contains one-third water by mass. Calculate how many pounds of strawberries are needed to make a..
What substances are present after the reaction is over? (Hint: Write a balanced chemical equation for the reaction first.) How many grams of water are formed?
Assuming no energy is transferred to or from the surroundings, calculate the final temperature of the water after all the ice melts.
The metal hydride LiH has a density of 0.77 g/cm3 . The edge of the unit cell is 4.086 . If it is assumed that the H ions define the lattice points, does the compound have a face-centered cubic or a simple cubic unit cell?
insulin is a protein that is used by the body to regulate both carbohydrate and fat metabolism. A bottle contains 475 of insulin at a concentration of 30.0 . What is the total mass of insulin in the bottle?
What fraction of piperazine (perhydro-1,4-diazine) is in each of its three forms (H2A, HA-, A2-) at pH 8.44
What is the concentration of [Cl?] in a solution of 10 mL of 12 M HCl when 6 mL of water is added
How many stereogenic centers are there in 1,1,2,3-tetramethylcyclohexane? a) 1 b) 2 c) 3 d) 4
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