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a 1.00 L buffer solution is 0.250 m in HF and 0.250 m in NaF. Calculate the pH of the solution after the addition of 100mL of 1.00 M HCL. the Ka for Hf is 3.5*10-4
Determine how many atoms there are in 1 gallon using your knowledge of mole calculations and unit conversions. Assume that the molecular formula for gasoline = C6H14 ,the density of gasoline =0.85 grams/mL
The greater volume per mole at the higher temperature indicates greater average intermolecular distances and hence weaker intermolecular forces.
Silver chloride, often used in silver plating, contains 75.27% Ag.Calculate the mass of silver chloride in grams required to make 6.0 g of silver plating.
A penny with a scored edge allows the HCl to react with the internal zinc metal, leaving a shell of unreacted copper. How many moles of hydrogen gas are formed by reacting a penny with excess HCl?
The first ionization energy of bismuth is = +703 . What is the longest possible wavelength of light that could ionize an atom of bismuth?
How many kJ of energy are required to convert 747 grams of water (liquid) at 23.4°C to steam at 100°C? The following information is given for H2O:
calculate the final temperature of a mixture of 130.0 g of ice initially at -22.5 Celsius and 310.0 g of water initially at 80.5 Celsius.
For a certain glass electrode, the selectivity coefficient for Na+ relative to H+ is 1.0 x 10-12. The electrode is calibrated with NBS standard buffers 6.86 and 9.18,
if 0.100 m NaCl is added slowly to a beaker containing both .120m AgNO3 and .150m Pb(NO3)2 at 25 celsius which will precipitate first AgCl or PbCl2?
In the reaction of noroborene to noroborenol, the exo, and endo forms are created. Why exactly is the exo form favored over the endo form
If the acid dissociation constant, Ksuba, for an acid HA is 8 x 10^-4 at 25 degree C, what percent of the acid is dissociated in a 0.50 M solution of HA at 25 degree C?
A sample of pure NO2 is heated to 388C at which temperature it partially dissociates according to the equation.
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