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A buffer was prepared by dissolving .200 mol of the weak acid Ha (ka 1.00x10^-5) plus .050 mol of its conjugate base Na+A- in 1.00L find the pH?
Suppose that 28 g of gold is initially at 29.0 degrees celsius. What is the final temperature gold upon absorbing 2.25 kJ of heat?
Aluminium (atomic mass 26.98 g/mol) crystallizes in a face-centered cubic unit cell. In addition, aluminium has an atomic radius of 143 pm. What is the density of aluminium
If a wheelchair-marathon racer moving at 13.3 miles per hour expends energy at a rate of 635 Calories per hour, how much energy in Calories would be required to complete a marathon race (26.2 miles) at this pace
Chlorine will spontaneously react with iodide to produce chloride and iodine.
The overall equilibrium involves Ksp, Ka3 of phosphoric acid and Kw. Construct the constant and show the three equations that apply.
A sample of gas in a balloon has an initial temperature of 22 and a volume of 1610 . If the temperature changes to 58, and there is no change of pressure or amount of gas, what is the new volume, , of the gas?
Consider 1.5 kg of austenite containing 1.15 wt% C, cooled to below 727 degrees Celcius (1341 degrees Farenheit).
The work function (i.e binding energy) W, of cesium of metal is 3.43 x 10^-19 J. Calculate the kinetic energy of the ejected electron if light of frequency 1.00 x 10^15 s-1 is used for irradiating the metal.
Calculate the pH at each point indicated in the titration of 100.00 mL of 0.0755 M NaClO2 with 0.0412 M HCl.
Calculate the maximum mass of Be(s) (in grams) that can be deposited from BeCl2(l) melt by a current of 5.0 A that flows for 1.0 hour
Which of these is a coefficient in this chemical reaction? P4s(s)+5o2(G) p4o10(S)
A solution of 0.264 M NaOH is used to neutralized 54.0 mL H3PO4 solutions. if 1.0 mL of NaOH is required to reach end point what is the molarity of H3PO4
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