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The iron content of iron ore can be determined by titration with standard KMnO4 solution. The iron ore is dissolved in excess HCl and the iron reduced to Fe+2 ions. This solution is then titrated with KMnO4 solution, producing Fe+3 and Mn+2 in acidic solution. If it requires 41.95 mL of 0.0205 M KMnO4 to titrate a solution made with 0.6128 g of iron ore, what percentage of the ore was iron?
Grignard reagents can act as both a nucleophile and a base. Consequently, what would you expect to happen if that during the preparation of the phenylmagnesium bromide Grignard reagent
Which of the following nuclides have magic numbers of both protons and neutrons: (a) helium-4, (b) oxygen-18, (c) calcium-40, (d) zinc-66, (e) lead-208
the constant pressure molar heat capacity of a compound is found to vary with temperature.cpm 18.15 0.430t
Calculate the energy required to heat 1.30 kg of ethane gas (C2H6) from 27.0°C to 78.0°C first under conditions of constant volume and then at a constant pressure of 2.00 atm. Calculate ?E, ?H, and w for these processes
Which of these statements correctly describes a diamond?
how much thermal energy is evolved by a reaction in a calorimeter in which the temperature of the calorimeter and water
the vapor pressure of pure acetone propanone is 266 torr. when a non-volatile solute is added the vapor pressure of
Clove oil is produced by steam distillation of cloves. We use basic extraction to leave behind most of the other organic products in the clove oil.
Consider the decomposition of calcium carbonate. Assume that ?H° = 177.8 kJ/mol and ?S° = 160.5 J/K·mol for the temperature range. CaCO3(s) -> CaO(s) + CO2(g)
What is the molecular weight of thiopene, if 0.74 g of thiopene occupies a volume of 270 mL at 760 mmHg and 100 degrees C?
Calculate the molality, molarity, and mole fraction of FeCl3 in a 36.9 mass % aqueous solution
Draw a diagram of the electrochemical cell, labeling all electrodes and solutions. (1B). What is the pH in the Pt | H+ | H2 half-cell? (1C). What is the value of the equilibrium constant for the reaction occurring in this cell
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