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1.45 g sample of an iron ore is dissolved in acid and the iron obtained is fe2+ (aq). To titrate the solution, 21.6 mL of 0.102 M KMnO4(aq) is required. What is the percent of iron in the ore?
Suppose that you have a reaction vessel containing an equilibrium mixture of CO(g), O2(g), and CO2(g). Under the following conditions, will the amount of CO increase, decrease, or remain the same?
if 294 grams of is allowed to react with 176 grams of according to the following unbalanced equation, how many grams of are produced? How many grams of FeS2 and O2 are left?
Water in an enclosed vessel at 17°C contains a concentration of dissolved oxygen of 6 mg/L. At equilibrium, determine the concentration of oxygen in the space above the water in molal fraction. and the total pressure in the vessel. Henry's law con..
What mass of precipitate will form if 1.50L of concentrated Pb(ClO3)2 is mixed with 0.250L of 0.290 M Nal?
A second order reaction of the type A + B--> P was carried out in a solution that was initially .075 mol dm^-3 in A and .050 mol dm^-3 in B. After 1.0 h the concentration of A had fallen to .020mol dm^-3 a)Calculate the rate constant b)What is the..
what is the chemical calculation to figure out the following: calculate the number of moles of each ion present in the following solution: 10.2 mL of 0.451 M AlCl3 solution.
What is the radius of the cross section of a cylinder that has a volume of 644.0 m3 and a height of 12.6 m? (Volume=πr2×height)?
undergoes adiabatic expansion against a constant pressure of 78.5 kPa until the volume has increased by a factor of 3.0.Calculate q,w,delta T,delta U,and delta H.(The final pressure of the gas is not necessarily 78.5kPa.)
what are the products of the following acid base reaction and are the reactants or products favored? CH3-NH-CH3 + H3O+
Assume that a solid has a constant of Cp,m=25 J/K-mol from 50K to 298K and that the DeBye approximation is valid from 0K to 50K. Estimate the standard molar entropy Sm for the solid at 298K.
A compound of potassium had the following percentage composition: K 44.90%; H 0.5787%; P 17.78%. The rest was oxygen. Calculate the empirical formula of this compound
calculate the energy absorbed when 2.67 moles of ethyl ether undergo combustion: CH3CH2OCH2CH3(l) + 6O2(g)-> 4CO2(g)+5H2O(l) delta H=+1604 kJ/mol
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