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Based on equation:
2MnO4¬¬(-) + 6H(+) +5H2O2 → 2Mn(2+) +8H2O + 5O2
A 50.0 mL solution of hydrogen peroxide of unknown concentration was diluted with 1.00L of water. 25mL of this diluted solution was then titrated with acidified potassium permanganate; 20.25mL 0f 0.02 mol/L permanganate was needed to completely neutralise this sample. Fine the concentration of the original hydrogen peroxide solution in mol/L.
The concentration of carbon monoxide in an apartment is 62 micrograms/m^3. How many grams of carbon monoxide are present in a room measuring 10 x 12 x 7.5 feet? Use correct number of sig figs.
solution containing the iron(II) thiocyanate complex is 0.45, Then calculate the mile per liter concentration of the complex
An impure sample of sodium chloride weighed 0.6825g. When dissolved in water and reacted with excess silver nitrate, AgNO3, 0.9855g of AgCl precipitated. What is the percentage of NaCl in the impure sample.
Fluorite, a mineral of calcium, is a compound of the metal with fluorine. Analysis shows that a 2.26 g sample of fluorite contains 1.50 g calcium. Calculate the following. (a) mass of fluorine in the sample
Draw a Lewis structure for each of the following molecules and determine its molecular geometry. What kind of intermolecular forces are present in each substance?
Suppose you take a trip to a distant universe and find that the periodic table there is derived from an arrangement of quantum numbers different from the one on Earth
Calculate the pH of an HCl solution if 16.5 mL of this HCl solution is titrated with a 0.454 M NaOH and it took 5.65 mL of the NaOH to reach the equivalnce point.
What quantity of heat is required to change 40.0 g of ice at melting point to liquid water? The heat of fusion of ice is 335 J/g. The answer should be 13400 J Please include steps in solving
A solution of potassium hydroxide of unkown concentration is used to titrate 15.0 mL of a 2.5M sulfuric acid solution. The volume of the base is needed 27.2mL. What is the molarity of the base?
a buffer is prepared by mixing .200 mole of formic acid with .300 mole of sodium formate in a volume of 200 ml what is the initial ph.
After the reaction has reached equilibrium, the absorbance of the product C is measured and its concentration is determined to be 0.00745 M. Calculate the equilibrium constant for this reaction.
A colloidal compound has 10^15 spherical particles per gram with a density of2.7 g/cm^3. What is the surface area per gram
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