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Compute the amount of work done against an atmospheric pressure of 1.00atm when 500.0 g of zinc dissolves in excess acid at 30.0°C (101.3 J = 1 L atm):Zn(s) + 2H+(aq) ? Zn2+(aq) + H2(g).
What is the pH at 25 deg celcius of the solution obtained by dissolving a 5.00 grain tablet of aspirin in 0.500L of water? The tablet contains 5.00 grains or 0.325g of acetylsalicylic acid HC9H7O4. The acid is monoprotic and Ka for the acid is 3.3..
if a 1.22 g piece of gold is hammered into a sheet whose area is 32.4 ft2 what is the average thickness of the sheet?
Consider the molecules ClF3O and BrF3O. (a) Would expect the lone pair on the central halogen to be axial or equatorial in these molecules? Explain
Aluminum has many different isotopes. What percentage of the mass of 26Al is attributable to its neutrons
The appropriate chemical equation is PCl3(g)+Cl2(g) PCl2 Calculate the new partial pressures after equilibrium is reestablished.
How many moles of KHP were weighed out? How many moles of NaOH were required to neutralize the KHP that was weighed out?
an aluminum tank of volume 0.0300 m3 is filled to the top with mercury at 20.0 degc. the tank is placed inside a
if the initial concentration of the reactant in a first-order reaction A-> products is 0.64 mol/L and the half-life is 30.0 s. what is the concentration after 60 s.
If 0.628 moles of a substance weighs 77.3 g, what is the molar mass of the substance, in units of g/mol?
A 0.100 M solution of a certain weak acid, HA, is found to have a pH of 2.45. Calculate the % ionization for the acid. Enter the answer as a decimal number with 3 decimal places. Do not enter the units.
one method used to store energy during times of low demand is by pumping water uphill into a reservoir. when energy
What do you notice about the element Technetium (Tc) compared to the other elements around it? You see the same thing as some of the very heavy elements
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