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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 solvent for an organic reaction is prepared by mixing 70.0 mL of acetone (C3H6O) with 73.0 mL of ethyl acetate (C4H8O2). This mixture is stored at 25.0 degrees C.
a runner generates 418 kj of energy per kilometerfrom the cellular oxidation of food. the runners body mustdissipate
Compute the expected pH when 0.5mL of 0.1 M HCL is added to 30.0mL pure water. Do the same computation when the same amount of HCL is added to 30.0mL of your original .05M buffer. Compare the compute pH to the actual measured pH.
Borax is used to standardize a solution of HCl. If 0.2334 g of borax requires 24.31 mL of HCl titrant, what is the HCl concentration
what is the mass percent composition of aluminum in aluminum
A hydrocarbon with molecular formula C13H20 is chiral as well as has a structure such that one of its give sp3 hybridized carbon atoms is attached to four different acyclic subunits with formula C3H5. Explain what is the structure of this hydrocar..
a how many grams of naoh are needed to neutralize 20.0 ml of 0.150 m h2so4 solution? b how many liters of 0.500 m
A solution is made by mixing 12.0 g of NaOH and 75.0 mL of 0.200 M HNO3. Calculate the concentration of each ion remaining in the solution and determine whether the solution is acidic or basic.
Problem- The atmosphere is stable with a lapse rate of -0.2 degree C/100 m. The surfaces air temperature is 15 degree C. A parcel of air is released at the ground with a temperature of 25 degree C. Calculate the maximum mixing height in m. The Ans..
Sulfur, S8, combines with oxygen at elevated temperatures to form sulfur dioxide. If 288 oxygen molecules are used up in this reaction, how many sulfur molecules reacted. In the reaction above, how many molecules of sulfur dioxide were formed
Question- A piece of metal weighing 96.525 g is hammered into a rectangular sheet that has an area of 6.75 cm2 and is 2.00 cm thick. What is the identity of the metal. The density of each metal is shown in parenthesis.
Assuming that the atoms are spheres and the radius of each sphere is 1.23 Å, what is the volume of one atom in Å3? (Vsphere = 4/3?r3.)
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