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Chromium metal can be produced from the high temperature reaction Cr2O3 [chromium ||| oxide ] with silicon or aluminum by each of the following reactions
Cr2O3 + 2 Al -> 2 Cr + Al2O3
2 Cr2O3 + 3Si -> 4 Cr + SiO2
Calculate the number of grams of aluminum required to prepare 327g of chromium metal by the first reaction
Calculate the number of grams of silicon required to prepare 327g of chromium metal by the second reaction
When optically active propylene oxide is used, the 1,2-diol obtained from the acid hydrolysis has a optical rotation opposite from the Alkaline hydrolysis. Write the mechanism of each hydrolysis that is likely to explain these facts.
List the factors affecting the rate of lipid oxidation and give the corresponding methods that slowdown lipid oxidation
Construct a cel from Ni(s), Ni^2+(l), Cd(s) and Cd^2+(l) a. What would be the anode and what would be the cathode? b. indicate the half reactions happening at each the anode and the cathode
what is the standard free energy change for thisreaction? Substance ?G°f (kJ/mol) CH3CH2OH(l) - 174.9 O2(g) 0 CO2(g) -394.4 H2O(g) -228.6 Express the free energy change inkilojoules using five significant figures. ?G° = ? kJ
When 5.00 × 1022 molecules of ammonia react with 4.00 × 1022 molecules of oxygen, how many grams of nitrogen gas are produced? 4NH3(g) + 3O2(g) → 2N2(g) + 6H2O(g)
Describe what will happen to the length of the rubber band when the hair dryer is turned on, and explain the observed behavior.
How much heat do you need to raise the temperature of 150 g of gasoline from 30oC to 15oC?
Assume that O2(g) and H20(g) can be described by the van der Waals equation of state. Decide which between 1 mole of O2 and H20 has the highest pressure at the same value of T and V
Assume that a gold atom is shaped like a sphere. An atom of gold has a radius of 156 pm and a mass of 197 amu. Determine the density of a single gold atom in units of g/cm3. (1 amu = 1.66 x 10-24g).
Calculate the difference in the ionization energies for 1H and 4He atoms. This result allows you to compare the effect on the ionization energy of changing the nuclear charge
Calculate the rate constant for the reaction when the reactant concentration in a first-order reaction is given 7.30×10-2M after 15.0s and it is also reported 4.40×10-3M after 65.0s . ?
The saturated solutions of Ca(OH)2 contain a white solid which is removed by filtering. What is this solid. If that solid were not removed, how would it affect the calculated values of the solubility product constant (Ksp) and the solubility of Ca..
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