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Explain how much energy is contained in 1 mol of the following: λ- ray photons with a wavelength of 2.60 * 10-5 nm? Express answer in kJ/mol
Hair splits most easily along its fiber axis, whereas fingernails tend to split across the finger (sideways) rather than along it. What are the directions of the keratin fibrils in hair and in fingernails
at 25omicron c an aqueous solution containing 35.0wt h2so4 has a specific gravity of 1.2563. aquantity of the 35
calculate the change in enthalpy when 52.0 g of solid chromium at 25 degrees celcius and 1 atm pressure is oxidized.
Cyclobutane decomposes to ethene in a first-order reaction. From measurements of the rate constant (k) at several absolute temperatures (T), the accompanying Arrhenius plot was obtained (ln k versus 1/T).
The normal melting point of benzene is 5.5 degrees Celsius . For the process of freezing, what is the sign for each of the following
a solution is prepared using 15.0 ml of 1.0 m hcl and 20.0 ml of 0.5 m hno3. the final volume of the solution is 1.25
What is the concentration of an ammonium chloride solution prepared by using 0.5L of water to dissolve the product of the reaction of 1.25 L of ammonia gas at 22 degrees C
What is the Slater determinant for the GS of Be? I need to also find an expression for its energy in terms of Coulomb and Exchange integrals.
It takes 16.6 min for a 10.0-mL sample of an unknown gas to effuse through a pinhole. A 10.0-mL sample of helium, He, required 5.00 min. What is the molecular weight of the unknown gas
then dried the flask and added some pieces of titanium to it. the stoppered flask plus the titanium weighed 64.763g. then filled the flask w/water, leaving the titanium pieces in the flask, and found a mass of 67.561g for the flask plus titanium a..
How many grams of magnesium fluoride (MgF2) must be added to 67.3 g of water to prepare a 4.81% (m/m) solution of magnesium fluoride
Determine the gram-formula mass of the product of this reaction. Include proper units.
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