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For the synthesis of an insoluble salt (such as SrCl2 and Na2SO4, to get SrSO4) what are some reasons why percent yield may be greater than 100%? Lower than 100%?
Calculate the solubility of N2 gas in water if the pressure of N2 gas over the solution is 6.00atm. Express the answer numerically to three significant figures.
In a first order decomposition in which the rate constant is 0.00830 sec-1, how long will it take (in minutes) until 0.309 mol/L of the compound is left, if there was 0.517 mol/L at the start
If one atom of carbon-14 weighs 14.0035 atomic mass units and one atomic mass unit is equal to 1.660539*10^-24 grams, what is the mass of 25 atoms of carbon-14 in grams?
The specific heat of an unknown metal is found to be 0.233 J/K g. The Law of Dulong and Petit predicts a molar heat capacity of 26 J/K mol. Use this law to estimate the molar mass of the metal.
A 11.90 mL sample of this stock solution is added to 52.50 mL of water. Calculate the concentration of ammonium ions and sulfate ions in the final solution.
If the concentration of H2 in the equilibrium mixture is 0.426 M, what mass of methanol was initially introduced into the vessel?
A compound called pyrene has the empirical formula C8H5 . When 4.04 g of pyrene is dissolved in 10.00 g of benzene, the boiling point of the solution is 85.1°C.
what mass of carbon should be produced if the tums were pure calcium carbonate? this is theoretical yeild. equation
Sulfurous acid, H2SO3, is a weak diprotic acid (pKa,1=1.89 and pKa,2=7.21 at 25oC). What is the pH of 0.121 mol/L H2SO3(aq) at 25oC.
An aqueous solution contains 4.90% NH3 (ammonia) by mass. The density of the aqueous ammonia is 0.979 g/mL. What is the molarity of NH3 in the solution?
What is the titer of the iodine solution of the .1000g sample of pure ascorbic acid 23.52 ml I2.
How many sodium ions are needed to provide the free energy to transport a molecule of glutamic acid from a concentration of 0.1 mM outsie the cell to 20mM inside the cell given a concentration of Na+ of 140 mM outside the cell to 10mM inside the c..
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