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The number of vacancies in some hypothetical metal increases by a factor of 5 when the temperature is increased from 1020 K to 1200 K. Calculate the energy (in kJ/mol) for vacancy formation assuming that the density of the metal remains the same over this temperature range.
A hydrogen atom initially in the n=11 quantum state emits a photon having a wavelength of 2.87144E-6 m. What is the quantum number of the final state of the atom
A solution contains 3.60 mol of water and 1.50 mol of nonvolatile glucose (C6H12O6). What is the mole fraction of water in this solution?
Iron and vanadium both have the BCC crystal structure, and V forms a substitutional solid structure in Fe for concentrations up to approximately 20 wt% V at room temperature.
The Fischer esterification mechanism is examined in the following two questions in the assignment
the external pressure is constant at 1.00 atm; and 4) the heat of vaporization of water is 2.26 kJ/g. What is q for the vaporization of 1.00 g of liquid water at 1.00 atm and 100C, to the formation of 1.00 g of steam at 1.00 atm and 100C
The precipitate was filtered, dried, and weighed. A total of 2.10 g calcium fluoride was collected. What was the percentage of CsF in the original sample?
Based on the following equation, determine the mass of a 50.0mL sample of your salt solution. Report the mass as a number and use all lower case letters to spell out the word(s) in the unit(s).
A 25.0 mL sample of river water was titrated with 0.0010 M Na2Cr2O7 and required 8.3 mL to reach the end-point. What is the chemical oxygen demand, in milligrams of O2 per liter, of the sample?
anesthetic contains 64.9 % carbon, 13.5 % hydrogen, and 21.6 % oxygen by mass. At 120 degrees C and 750 mmHg, 1.00 L of the gaseous compound weighs 2.30 g.
How many grams of NaCl are contained in 350 ml of a 0.25 M solution of sodium chloride?
2-iodo-4-methylpentane was refluxed for an hour in the presence of sodium isopropoxide. Name and draw the product(s) of this reaction clearly showing the stereoselectivity and regioselectivity of the reaction.
Perform a series of experiments for the reaction A?B+C and find that the rate law has the form rate = k[A]x. Determine the value of x in each of the following cases.
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