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Question- If an unknown forms a silver mirror in the Tollens test, forms a purple color in the Schiff test, produces no precipitate in the iodoform test, has a refractvie index of 1.5250, and forms a semicarbazone melting at 124-126 C, what is its identity? Support your conclusions.Should answer all portions and the identity
A second-order reaction that destroys compound A via the reaction A to B is occurring in a batch reactor. It is 40% complete after 30 minutes. Determine the rate constant, and the time required to achieve 95% completion?
Write equations for the mechanism for saponification of methyl benzoate, begin with nucleophillic attack of hydroxide ion on the carbony group of the ester.
By Solving this problem student understand about isotopic abundance and how to calculate atomic weight (average atomic mass) of an element -
A solution of Ba(OH)2 and a solution of H2SO4 are mixed. Water and precipitate of BaSO4 are formed.
The upper falls in Yosemite National park, at 440 m, is among the 20 highest waterfalls in the world. Estimate the difference between the temperature of the water at the top and bottom of the falls. The molar heat capacity of water
look up the densities of ethanol and water at room T in a habnbook ethanol 0.789 g/cm^3 and water 0.998 plot these two points on a graoh at 0 and 100%H2O
You have samples of approximately 8mL solution with ph ranging from 4 to 10. Calculate the volume of 1M HCIO4 needed to lower the ph to 2.5.
The composition of a gas on a dry basis is 74.0 mole% N2, 10.0% O2, 12.0% CO2, and 4.0% CO. If the mole fraction of water is 0.190, what is the gas composition on a wet basis
Ice floats on water. For most other substances however, the solid sinks in the liquid.Classify each of these statements as true for water, or true for most other substances.
A 0.15 M solution of chloroacetic acid has a pH of 1.86 What is the value of Ka for this acid
a what temperature change would you expect in which 50.0 ml of 2.0m hcl is combined with 80.0 ml of 2.0 m naoh in
How many milliliters of 2.6 M NH4Cl must be added to 260 mL of 0.20 M NH3 to obtain a buffer solution having pH=9.40
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