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Consider 1.5 kg of austenite containing 1.15 wt% C, cooled to below 727 degrees Celcius (1341 degrees Farenheit). a) What is the proeutectoid phase?
What is the broglie wavelength of an electron moving at one-tenth the speed of light. mass of the electron = 9.109* 10^-28
The vessel contains 5.00 moles of hydrogen, 2.00 moles of helium, and 2.00 moles of krypton. What is the partial pressure of helium?
The first order rate constant for a reaction at 700 oC is 8.98e-03 s-1. If the activation energy for the reaction is 340 kJ/mol, what is the rate constant at 800 oC?
Estimate the enthalpy change for the combustion of one mole of acetylene, C2H2, to form carbon dioxide and water vapor. Start by writing the balanced combustion reaction.
What molar ratio of sodium acetate to acetic acid (NaAc/HAc) should be used in preparing a buffer having a pH of 4.35? (Ka = 1.8×10-5 for acetic acid.)
What are the technique that we encounter in the experiment of preparation of standard solutions and standardization of hydrochloric acid solution with primary standard sodium carbonate solution
If 5.50 of the unknown compound contained 0.183 of and 0.367 of , how many moles of oxygen, , were in the sample?
A phosphorous acid buffer needs to be prepared to a pH of 5.92; given a 120mL solution of 25mM phosphorous acid, how many milliliters of either 0.5M KOH or 0.4M HCl will need to be added to the solu
What is the rate constant of a first-order reaction that takes 2.50 minutes for the reactant concentration to drop to half of its initial value?
Compare the bonding in S-Cl with S-OH in Sulphur (VI) compounds and attempt to rationalise the reactivity of the chloro-derivatives of Sulphuric acid with water?
A gas occupying a volume of 428 mL at a pressure of 0.970 atm is allowed to expand at constant temperature until its pressure reaches 0.541 atm. What is its final volume?
A stainless steel spoon weighs 25.2 g and is at a temperature of 18.5 oC. It is immersed in 81.7 mL of hot coffee (T = 84.0 oC) in a Thermos flask. What is the final temperature of spoon + coffee?
Sulfuric acid is a diprotic acid with the formula H2SO4. Phosphoric acid is a triprotic acid with the formula H3PO4. Which will have a lower pH as aqueous solutions? A 1 M solution of H2SO4 or a 1M
What conversion factor is present in almost all stoichiometry calculations?
The most common source of copper Cu) is the mineral chalcopyrite CuFeS_2). How many kilograms of chalcopyrite must be mined to obtain 355 g of pure Cu?
What volume of {rm{O}}_2 gas (in {rm L}), measured at 795 {rm mmHg} and 33^circ {rm C}, is required to completely react with 54.0 {rm g} of {rm Al}?
N2 is .070 moles, O2 is 0.35 moles and CO2 is 0.20 moles, the total is pressure 1.55 atm what is the pressure of N2?
Calculate the apparent degree of dissociation of the NH4Cl if the freezing point of this solution is -15.3OC?(Molal freezing point constant =1.86OC)
What is the pH at the equivalence point in the titration of 10.0 mL of 0.51 M HZ with 0.200 M NaOH? Ka = 5.1 × 10-6 for HZ
A 35.00 mL sample of NaOH solution is titrated to an endpoint of 14.76 mL 0.4122 M HBr solution. What is the molarity pf the NaOH solution?
A 25.00 mL sample of 0.100 M CH3CO2H is titrated with 0.100 M NaOH. What is the pH of the solution at the points where 24.0 and 24.5 mL of NaOH have been added. (Ka = 1.8 x 10-5).
What is the similarity between metal olefin and metal hydrogen bonds?
Al3+ is reduced to Al(s) at an electrode. If a current of 2.00 ampere is passed for 48 hours, what mass of aluminum is deposited at the electrode? Assume 100% current efficiency.