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Problem- What is the hydronium ion concentration in a solution prepared by mixing 50 mL of 0.10 M HCN with 50 mL of 0.030M NaCN?
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if the volume of the gaseous reactants and products in the equation 2c2h6nbsp 7o2regnbsp4co2nbsp 6h2o are measured at 1
Hydrogen a potential future fuel, can be produced from carbon from coal as well as steam by the following reaction:
Why could you have predicted that the pH would rise after addition of sodium acetate to pure 0.40 M acetic acid from part (a) by applying Le Chatelier's principle
the balanced net ionic equation for the reaction that takes place in aqueous solution between hydrogen peroxide and potassium iodide to make potassium hydroxide and molecular iodine.
Problem- You are using the following procedure from your lab instructions to determine the copper content of a brass sample: "Approximately 35 mg of a dried brass sample (accurately measured) is put into a 250-mL Erlenmeyer flask.
One thousand tonnes (1000t, t=10^3 kg) of sand contains about a trillion grains of sand. How many tonnes of sand are needed to provide 1 mol of grains of sand
The resulting solution required 13.73 mL of 0.176 mol L 1 NaOH(aq) to neutralize the excess, unreacted HCl. What was the percentage by mass of Mg(OH)2 in the original sample
At what radius does the probability of finding an electron at a point in the H atom fall to 50 per cent of its maximum value
1- calculate the radius of a marble of mass 75.673g and density 2.443g/cm3, volume of sphere V= (4/3)?r3)
A buffer was prepared by mixing a solution that is 0.285 M in HA and 0.385 in A-. The pH of this buffer was 4.435. then to 405 mL of this buffer solution was added to 21.5 mL of 2.0 M HCl. What is the pH of this new solution?
We place 1.32 mol PCl5 in a 1.0L flask and allow it to reach equilibrium at a given temperature. What is the final concentration of Cl2 in the flask? PCl5 = PCl3 + Cl2 K= .47
What is the change of H for the following reaction at 273 K?
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