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A ball is released from the top of a cliff; it hits the ground 2.6 seconds later. Assuming the ball is a free falling object, how many meters is the cliff above the ground below? (Use g = 9.8 m/s2. Express your answer to one decimal point.)
Compute the pH after the addition of 0.0mL, 5.00mL, 18.0 mL, 25.0mL, 38.0mL, 50.0mL and 65.0 mL of 0.200 M NaOH (aq) to 50.00mL of 0.100 M malic acid, L-hydroxybutanedioic acid. pka1=3.459, pka2=5.097
Calculate the pH (to two decimal places) of the buffer solution after the addition of 13.9 mL of a 0.0525 M solution of hydrochloric acid to the existing buffer solution.
The standard free energy of activation of a reaction A is 76.9 kJ mol-1 (18.4 kcal mol-1) at 298 K. Reaction B is one hundred million times faster than reaction A at the same temperature
The temperature of 50g of water was raised to 60 degrees C. by the addition of 4100 joules of heat energy. What was the initial temp. of the water in degrees Celcius?
Iron has a body-centered cubic unit cell, and a density of 7.87 g/cm3. Calculate the edge length of the unit cell, in pm.
A chemical reaction has k=9.3*10^-5 1/M sec at 200 degrees C, if the activation energy Ea=99 kJ/mol, what is the value of k at 130 degrees C
Extracting aluminium uses a current of 25000 ampere.What is the time taken to produce 10kg of aluminium from Al2O3(liquid
solid sodium sulfate reacts with solid carbon to form solid sodium sulfide and carbon monoxide. if 15 grams of sodium
To 250 mL of a 0.065 M solution of barium nitrate is added 100 mL of a 0.121 M solution of sulfuric acid. Determine the concentration of aqueous barium ions remaining in the solution after complete precipitation of barium sulfate.
Why do primary alkyl halides typically undergo Sn2 substitution reactions more rapidly than do secondary or teritary alkyl halides?
The white precipitate obtained when cold HCl was added to an unknown solution was completely insoluble in both hot water and NH4OH
what is the best way to distinguish between levorotatory and dextrorotatory enantiomers if measured optical rotation is
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