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A solution containing both Mn2+ and Cd 2+ is saturated with H2S gas, after which the concentration of H is found to be .30 M. will the sulfides of these ions form a precipitate under these conditions? calculate the maximum concentration of Cd2+, Mn2+ that will remain in the solution
The C^14 decay rate for the sample of glue was found to be 5.60d/min/g. What is the approximate age of the glue. Disintegration of C^14 is a first order process with a rate constant 1.209*10^-4 year^-1.
It takes 47 mL of 0.124 M KOH to neutralize 47.8 mL of H2SO4 solution. What is the concentration of the H2SO4 solution? Answer in units of moles/liter
Approximate the percent increse in waste size that occurs when a 155lb person gains 40.0 lbs of fat. Assume that the volume of the person can be modeled by a cylinder that is 4.0 feet tall.
What is the percent hydrogen (H) by weight of a solution containing 53.5mL of CH3COCH3? The density of acetone is 0.788 g/mL
Calculate the counts s-1 which should be observed by a detector of 2 cm2 area placed 300 cm from a sample of l2 containing 2 millicuries of 128l.
Determine the root-mean-square speed of CO2 molecules that have an average kinetic energy of 4.21*10^(-21) J per molecule.
What is the percent by mass of NaHCO3 in a solution containing 20 g NaHCO3 dissolved in 700 mL H2O?
The free energy change Delta Gt at 500 K is equal to 9.8x10^4 J/mol. Calculate the equilibrium constant at 500 K.
Methane diffuses approximately 2.43 times as fast as an unknown gas. Which of the following could be and unknown gas?
How many grams of dry NH4Cl need to be added to 1.60 L of a 0.700 it M solution of ammonia, NH_3, to prepare a buffer solution that has a rm pH of 8.62? K_b for ammonia is 1.8 * 10^{-5}
When placed in a graduated cylinder that initially contains 24.00 mL of water, the water level rises to 28.55 mL. What is the density of the unknown material?
A sample of a gas occupies 1470 mL at 60.7?C and 740 torr. What volume would it occupy at the same pressure and 450?C.
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