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An aircraft with mass 39290 kg has a constant acceleration of 2 m/s2 as it starts (from rest) down the runway for take-off. The plane reaches take-off speed in 30.1 seconds. What is the aircraft's take-off speed in mph?
The vapor pressure of pure water at 25 degrees Celsius is 28.3 mmHg. Estimate the mass in grams of KCl needed per liter of pure water to reduce the vapor pressure of water at 25 degrees Celsius by 5%.
Question- A. Calculate the pH at the equivalence point for the titration of 0.160 M Methylamine with 0.160 M HCl. The Kb of methlylamine is 5.0 x 10^-4.
How much heat is produced in burning 5 mol of C2H2 under standard conditions if both reactants and products are brought to 298 K
Balanced chemical equation for the combustion of liquid ethanol c2h5oh, in oxygen, yielding gaseous carbon dioxide and water vapor.
A TLC plate was run in 1:1 ethyl acetate and hexane, but when developed the plate only showed baseline spots. What change could be made to get the spot(s) to move further up the plate
Experiments have shown that the average frequency of chirping by a snowy tree cricket depends on temperature as shown below.
the average osmotic pressure of blood is 12.3 atm at 27 degree c. what concentration of glucose will be isotonic with
Complete the following potential energy diagrams for the formation of B and C by sketching the energy curve for each product. The diagrams are
Two isomeric compounds A and B are known to each have a monosubstituted benzene ring and have the formula C6H5C3H5O2. Both are insoluble in water. When placed in diluted aqueous solution NaOH one of them dissolves. Provide structures for compounds..
Explain in words how you would prepare 1 L of 1 M Tris buffer at a pH of 8.0. The molecular weight of Tris is 121.1 g/mol and its pKa is 8.1.
What is the PH of a 100 mM solution of PIPES if the pKa is 6.76? What is the PH of a 250 M solution of TRIS if the pKa is 8.08? A 100 mM solution of a weak organic acid has a PH of 3.6, What is the pKa of the acid?
A gaseous mixture of O2 and Kr has a density of 1.114 g/L at 431 torr and 325 K.What is the mole percent O2 in the mixture.
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