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The velocity of the electron ground state hydrogen atom is 2.2x10^6 m/s. What is the wavelength of this electron in m
Calculate the superhelical density of a 5000 bp plasmid DNA containing 25 positive supercoils (of B-form DNA).
Most of the solid did not dissolve because the Ksp of ferric hydroxide is very small at 3 x 10^-39. However, when a certain amount of strong acid was added, the entire amount of solid dissolved. Determine the pH of the solution at that point that ..
A solution of ammonia and water contains 4.20×10^25 water molecules and 6.90×10^24 ammonia molecules. How many total hydrogen atoms are in this solution?
Titanium tetrachloride, TiCl4, has a melting point of -23.2 C and has a Delta H fusion = 9.37 kJ / mol.
What volume in liters of O2(g) is required to form 46 L of CO2(g)? Assume both gases are measured under the same conditions.
Calculate the molarity of a solution made by dissolving 0.0715 mol Na2SO4 in enough water to form 550 mL of solution.
How many kilocal are required to increase the temp of 15.6g of iron from 122C to 355C? the specific heat of iron is
A solution has an H3O1+ concentration of 1.7 10-2 M. What is the hydroxide ion concentration?
what number of grams of NaHCO3 in a .210 g piece of antacid would generate 38.0 moles of CO2, if the CO2 is measured at 20 degrees C and 1.00 atm.
Choose any two temperatures and corresponding vapor pressures in the table given, and use those values to calculate ?Hvap for dichloromethane (in kJ/mol).
A container of gas at 760 mmHg and 20 degrees C is heated to 40 degrees C. What is the new pressure in mmHg?
You and your lab partner take melting points of the same sample. You observe a melting point of 101-107°C, while your partner observes a value of 110-112°C. Explain how you can get two different values with exactly the same sample.
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