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In the reaction between H2O2 and I^-, 15 ml of 0.30 M KI, 68 ml of 0.10 M H2O2and 19 ml 0.020 M Na2S2O3 were mixed in a flask containing starch and buffer and the total volume was made up to 500 ml with distilled water. The solution turned blue 9 indicating the presence of I2) in 1.8 minutes. Calculate the initial rate of disappearance of H2O2 in units of M min^-1 to two significant figures.
How many milliliters of 0.483 M HBr solution can be made from 38.0 mL of 8.00 M HBr solution?
The dimerization of Nitrogen Dioxide has a rate constant of 2.45 x 10-2 L/mol min at 25 °C. What will be the concentration of NO2 after 2 minutes? given a starting concentration of NO2 = 11.5 mol/L
if you burn 40.7 g of hydrogen and produce 364g of water, how much oxygen reacted?
A solution containing 50.0 g NaNO3 in 75.0 g of H20 at 50°C is cooled to 20°. How many grans of NaNO3 remain at 20°.
Determine the concentration of the HCL solution from the data for the standardization of the HCl with the Na2CO3 Na2CO3 had 0.0826 grams in 25ml of water Initial volume of HCl in the burette was 50ml Volume of HCl
identify the absorptions associated witht he carbonyl group and with the aromatic rings
Explain why caffeine can be extracted from tea leaves into hot water, and how you extracted the aqueous solution and isolated crude caffeine
A zero-order reaction has a constant rate of 2.00×10-4 . If after 50.0 seconds the concentration has dropped to 6.00×10-2 , what was the initial concentration?
Acetone (nail polish remover) has a density of 0.7857 g/cm^3. a. What is the mass, in g, of 28.56 mL of acetone? b. What is the volume, in mL, of 6.54 g of acetone?
What is the total energy of the photons detected in a period of one hour If a radiation detector is capturing 8 X 10^7 photons per second at this wavelength,?
Calculate the enthalpy change associated with the conversion of 25.0 grams of ice at -4.00°C to water vapor at 110.0°C. The specific heats of ice, water, and steam are 2.09 J/g-K, 4.18 J/g-K, and 1.84 J/g-K
If the volume of the container is reduced to 15.0 L and the pressure remains at 760 mm Hg total pressure. Calculate the temperature of the gas mixture
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