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Problem- Calculate the Knoop hardness when a 431-g load yields an indentation diagonal length of 81.0*10^-6 m.
The measured HK of some material is 187. Compute the applied load if the indentation diagonal length is 0.20 mm.
Please explain how you came up with answer I really want to understand how to calculate this
Under which circumstances is it wise to use a mixture of solvents to carry out a recrystallization
Problem- Draw resonance structures of the anion produced in the reaction of alpha-naphthol with a base. Show how this anion couples with the diazonium salt.
Compute the standard change in Gibbs free energy for the subsequent reaction at 25 degrees Celsius.
which is commonly known as table sugar, reacts in dilute acid solutions to form two simpler sugars, glucose and fructose, both of which have the formula C6H12O6 At 23C
A hydrogen molecule in it's ground vibrational state with KE=10eV coollides with heavy atom metal surface and no energy is transferred to the surface. The surface can be modeled as an infinite potential wall.
pKa values of phosphoric acid are 2.2, 7.2 and 12.7. A phosphate buffer of pH = 7.4 can be prepared using
a sample of nitrogen gas in a 4.7-l container at a temperature of 28degc exerts a pressure of 3.6 atm. calculate the
The initial pH. the volume of added base required to reach the equivalence point the pH at 12.0 mL of added base
In the following experiment, a coffee-cup calorimeter containing 100. of is used. The initial temperature of the calorimeter is 23.0 . If 6.80 of is added to the calorimeter, what will be the final temperature of the solution in the calorimeter
Assume that you have carried out a radical chlorination reaction on (R)-2- chloropentane and have isolated (in low yield) 2,4-dichloropentane.
Suppose that the gas-phase reaction A B and B A are both elementary processes with rate constants of 5.40e+03 s-1 and 4.35e+04 s-1, respectively.
In which region of the carbon-13 NMR spectrum would you expect to find a resonance for the carbonyl group of an aliphatic ketone. The given chemical shift ranges are approximate. A. 50-80 ppm B. 180-210 ppm C. 100-150 ppm D. 65-85 ppm E. 9-10 ppm ..
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