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Suppose 0.2506g of Na2C2O4 isdissolved in 250mL of 1M H2SO4. This solution requires 34.7mL of KMnO4 solution for titration, what is the molarity of the permanganate solution?
a toothpaste contains 0.24% by mass sodium fluoride to prevent dental cavaties. One tube contains 119g of toothpaste. How many moles of NaF are in the tube of toothpaste.
what are the names of the quantity measured by each of seven SI base units and the SI symbols of the unit?
How much heat is absorbed in the complete reaction of 3.00 grams of SiO2 with excess carbon in the reaction below? Change in H degrees for the reaction is +624.6 kJ. SiO2 (g) + 3C (s) -> SiC (s) + 2CO (g)
Can someone please draw the scheme of Selenium: "A sample is preserved in the field at 4oC. The sample aliquot is oxidized, in acidic persulphate
15.0 moles of gas are in a 7.00 tank at 20.0. Calculate the difference in pressure between methane and an ideal gas under these conditions. The van der Waals constants for methane are a = 2.300L(squared).atm/mol(squared) and b = 0.0430 L/mol.
Consider the reversible reaction: 2NO2(g) N2O4(g). If the concentrations of both NO2 and N2O4 are 0.016 mol L-1, what is the value of Qc
A system absorbs 295 kJ of heat and the surroundings do 177 kJ of work on the system. What is the change in internal energy of the system?
A competitive inhibitor of carbonic anhydrase has a K(i) of 0.04 M. What is the V(max) for this reaction of 0.6 mg/mL in the presence of 4.20 mM inhibitor.
A 0.1000 m aqueous solution of a weak acid, HA, is 1.5% ionized. At what temperature does it freeze? Kf for water = 1.86°C/m.
Balance the following redox reaction in acidic conditions by following the instructions described below: As2O3 (s) + NO3- (aq) > H3AsO4 (aq) + NO (g)1. Determine the oxidation state of each of the elements or compounds involved in the reaction
The activation energy for the denaturation of a protein is 391.0 kJ/mole. At what temperature will the rate of denaturation be 19 percent greater than its rate at 25.00 degrees Celsius?
How many liters of water vapor can be formed by the reaction of 275.0 liters of oxygen gas and 250.0 grams of pentane? Which reactant is limiting? How many grams of the excess reactant are left over?
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