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how many grams of nickel would be electroplated by passing a constant current of 7.2 A through a solution of NiSO4 for 90 minutes?
A 15.00 mL sample of unknown concentration of sulfuric acid is precititated with excess lead(II) nitrate and a precipitate of lead(II) sulfate is collected.
Two gas tanks are linked by a connecting tube of negligible volume with a valve. One contains 15 L of nitrogen at 7.2 atm of pressure. The other contains 8.3 L of helium at 4.1 atm of pressure.
Determine what volume would it occupy at zero degree Celsius temperature at same pressure? Express your Answer in units of mL
Carbonate buffers are significant in regulating PH of blood at 7.40. Calculate the concentration of Carbon dioxide in a 0.200M NaHCO3 at PH=7.40.
A pound of coffee beans yields 70 cups of coffee (4 cups = 1 qt). How many milliliters of coffee can be obtained from 1.0 g of coffee beans.
A 2.914-g sample gypsum, a hydrated salt of calcium sulfate, CaSO4, is heated at a temperature greater than 170 C in a crucible until a constant mass is reached.
A 250.0 mL aliquot of 2.50 M H2SO4 solution is mixed with a 250.0 mL aliquot of 4.00 M HNO3 solution. What is the molarity of hydrogen ions in the combined solution.
100 mL of 0.200 M HCl is titrated with 0.250 M NaOH .What is the pH of the solution at the equivalence point?Express the pH numerically.
Compute the amount of heat evolved in the oxidation of 32.0 grams of Fe at the temperature 25 oC and pressure 1 atm pressure ( ΔHfo(Fe 2 O 3 ,s) = -824kJ/mol)
Calculate the final temperature of 204 mL of water initially at 35 degrees C upon absorption of 18kJ of heat.
Write down the Empirical Formula if aA Compound Is 21.20% nitrogen, 6.06% Hydrogen, 24.30% sulfur , And 48.45% Oxygen?
A buffer is made by dissolving H3PO4 and NaH2PO4 in water. Write and equation that shows how this buffer neutralizes added bases.
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