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What is the de Broglie wavelength (in meters) of a mosquito weighing 1.45 mg and flying at 1.34 m/s?
3H2+N2=How many grams of NH3 can be produced from 3.91g of N2?
1.00 moles of sucrose (C12H22O11), and 1.20 moles of glucose. Sucrose and glucose are nonvolatile. What is the mole fraction of water in this solution?
An aqueous solution contains 167 g CuSO4 in 820 mL of solution. Calculate the : a. Molarity b. Percent by mass c. Mole fraction d. Molality of the solution, The density of the solution is 1.195 g/mL
Explain why selectivity in isocratic HPLC system ideally should not depend on eluent composition. (Use thermodynamic derivation to support your explanation).
Barium fluoride has a Ksp of 1.0X10^-6. What is the barium ion concentration in a saturated solution where the fluoride concentration is 0.035M? Please show the steps needed to reach the end.
A solution is made by dissolving 92.4 g of a non-electrolyte in 800. g chloroform (Kb=3.63 degrees C-kg/mol and Tb=61.26 degrees celsius). The boiling point of this solution is 62.91 degrees celsius. What is the molar mass of the non-electrolyte
One liter of a buffer solution is made by mixing exactly 500 mL of 1.000 M Acetic Acid and 500 mL of 0.500 M Calcium Acetate solutions.
Two ideal gases are in a container but separated by an insulating barrier. The gases are both at a pressure of 2 atm but are at different temperatures and volumes.
A sample of K2S contains 1.35 g of potassium. How many moles of potassium sulfide are present in the sample
The final temperature of the mixture is 27.0 degrees celsius. What is the heat capacity of the unknown substance?
Bauxite, the principle ore used in the production of aluminum cans, has a molecular formula of Al2O3•2H2O. (a) Determine the molar mass of bauxite. (b) How many grams of Al are in 0.58 moles of bauxite?
how many milligrams of hydrazoic acid ( ka= 1.9x10^-5) must be in a 5.0-L solution that has a pH of 4.90?
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