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A water sample is suspected to be contaminated by iron (III) ions. How could you determine if the sample is really contaminated?
Calculate the pH of a 1.00 L solution which is made up of 0.046 mol acetic acid and 0.026 mol sodium acetate.
How many grams of sodium succinate (MW=140 g/mol) and disodium succinate (MW=162 g/mol) must be added to 1L of water to produce a solution with pH=6.0 and a total solute concentration
A balloon containing 6.40 g of nitrogen, N2, has a volume of 5.00 L. What mass of hydrogen, H2, must be added to the balloon to expand its volume to 11.0 L
What is the activation energy of a reaction. What are the two ways that the activation energy can be determined for a reaction, i.e. consider graphing what data and using what formula
The rate of reaction is 1.6 X 10-8 mol/L.min when the nitrogen oxide concentration is 0.020 M and the bromine concentration is 0.030 M. What is the value of K
the electron in the n=5 level of a hydrogen atom emits a photon with a wavelength of 1280 nm. To what energy level does the electron move?
By comparing the Charles's law equation to the linear equation, y= -0.171x + 46.837, where y is volume and x is temperature, determine the value of k.
Titration of sodium carbonate with HCl to the methyl orange end point involves the reaction of 1 mole of Na2CO3 with 2 moles of HCl. Write the balanced chemical equation in a.
A solution of household bleach contains 5.25% sodium hypochlorite, NaOCl, by mass. Assuming that the density of bleach is the same as water, calculate the volume of household bleach that should be diluted with water to make 500.0 mL of a pH = 9.80..
Calculate the entropy change when 1.86 g of H2 reacts with O2 according to the reaction 2H2(g) + O2(g) ! 2H2O(l) at 298 K and 1 atm pressure.
A gas sample was collected over water at 25.3 degrees C. The total pressure is determined to be 0.97 atm. What is the partial pressure of the gas that was collected
A metal sample weighing 124.10 g and at a temperature of 99.3 C was placed in 42.87 g of water in a calorimeter at 23.9 C. At equilibrium the temperature of the water and metal was 41.6 C.
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