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A mixture containing only Al203 (FM 101.96) and Fe203 (FM 159.69) weighs 2.019 g. When heated under a stream of H2, AI2O3 is unchanged, but Fe203 is converted into metallic Fe plus H2O(g). If the residue weighs 1.774 g, what is the weight percent of Fe2O3 in the original mixture?
A gas expands and does P-V work on the surroundings equal to 281 J. At the same time, it absorbs 216 J of heat from the surroundings. What is the change in energy of the system?
Draw a detailed mechanism for the FeBr3-catalyzed reaction of the ethylbenzene with bromine, and show why the sigma complex (and the transition state leading to it) is lower in energy for substitution at the ortho and para position than it is for ..
An unknown metal M reacts with sulfur to form a compound with the formula MS. If 4.37 g of M reacts with 2.51 g of S, what are the names of M and MS?
Calculate the molarity of a solution made by dissolving 0.150 mol Na2SO4 in enough water to form exactly 760 mL of solution.
A 0.1752g sample of silver nitrate was dissolved in 502.3g of distilled water. Calculate the weight molarity of silver in this solution.
Compounds are always composed of two or more elements. Atoms of different elements are different. Isotopes have the same number of protons but a different number of neutrons.
in a combustion reaction 4 moles of c8h18 react with 8 moles of o2. if the actual yield of co2 produced is 28.16 grams
Guesstimate the extent of the dipole moment of H 2 O in Debye units, treating H 2 O as three point charges. suppose the O-H distance = 1.00 A, angle H-O-H =104°. The
The solubility of calcium chromate is 1.56 ×10-3 g/100 mL of solution. What is the Ksp for CaCrO4?
Explain why the addition of a small amount of base to an acidic buffer solution causes only a small change in the pH of the buffer solution.
a 14.0 g sample of iron was heated from 10.0C to 20.0C it absorbed 15.2 of energy as heat based on this data what is the specific heat of this piece of iron?
Isobutane is the fuel used in disposable lighters. The lighters' operation is dependent upon the butane's ability to vaporize and be ignited, and this depends somewhat upon the large pressure difference between the inside of the lighter and the at..
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