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Chromium is produced by reacting its oxide with aluminum. If 76 grams of Cr2O3 and 27 grams of Al completely react to form 51 grams of Al2O3 how many grams of Cr are formed
What are the major differences between "theories", "hypotheses" and "laws". What is an example that would explain them.
what are the H3O+ and OH- concentrarions in a 125 mL solution prepared with 0.100 mol pf NaOH and water?
If 2.45 g of X reacts with 6.55 g of M to produce 11.25 g of a compound with the formula M2X3, and the atomic mass of M is 42.0 amu, what is the atomic mass of X
If a reaction mixture initially contains 443 of and 391 of , what is the mole fraction of when equilibrium is reached.
A 44.2 L sample of a gaseous hydrocarbon, measured at 1.00 atm pressure and 25 C is burned in excess oxygen, liberating 2.55x10^3 kj of heat at constant pressure.
Electrochemistry and Solubility, The potential of the cell Bi|Bi2S3(s) |Bi2S3(aq)|Bi is 0.96 V at 25*C. Calculate the solubility of Bi2S3, Assume it is an ideal solution.
A system comprised of chloroform, 1,4-dioxane, and ethanol exists as a two-phase vapor/liquid system at 50 degrees C and 55 kPa.
Nitrogen and oxygen gases react to form dinitrogen trioxide gas. 2 N2(g) + 3 O2(g) -> 2 N2O3(g) At a certain temperature and pressure 4.2 L of N2 reacts with 6.3 L of O2.
What is the concentration of OH- in a solution that contains 0.225g of NaOH in 0.250L of solutio.
If a bottle of nail polish remover contains 175mL of acetone, how much heat would be released by its complete combustion? The density of acetone is 0.788g/ML.
A 33.0 g sample of a nonelectrolyte was dissolved is 700. g of water. The solution's freezing point was -2.84°C.
Consider all the valence electron pairs of the central atom-both those that are shared in covalent bonds, called bonding pairs, and those that are unshared, called non-bonding pairs or unshared pairs.
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