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1. De Broglie:A mole of hydrogen gas was found to have an average De Broglie's wavelength of 1A (10^-10m), the approximate length of the H-H bond. What temperature is the gas kept at?(Hint: calculate the average square velocity or kinetic energy).2. Vibrations:A certain diatomic molecule vibrates with a characteristic frequency v= 2.45x10^9s^-1 (these are microwaves). Calculate the relative population of the ground state and first excited state at 1K.
Hydroxylamine hydrochloride is a powerful reducing agent which is used as a polymerization catalyst. It contains 5.80 mass % H, 20.16 mass % N, 23.02 mass % O, and 51.02 mass % Cl. What is its empirical formula?
What mass of ammonium chloride should be added to 2.45L of a 0.145M NH3 in order to obtain a buffer with a pH of 9.45
A compound containing only carbon, hydrogen and oxygen was analyzed by combustion analysis. Combustion of a 10.68g sample of the compound in excess oxygen gives 16.01g CO2 and 4.37g H2O.
During physical activity, lactic acid (MM = 90.08 g/mole) forms in muscle tissue and is responsible for muscle soreness. An elemental analysis shows that it contains 40.0 mass percent C, 6.71 mass percent H
After you determine the concentration of the unknown stock solution, you will need to use the density to calculate the % mass of thymol
A sample of 24.0 g of helium (He, M = 4.00 g/mol) has a temperature of T = 108 K and a pressure of 2.86 atm. Assuimg the this sample follows the perfect gas law, determine the volume it occupies.
What is the hydronium ion concentration of a 0.110 M acid solution of an acid whose ionization constant is 5.45 x 10-7
a hydrate of calcuim chloride contains 49.3% water and has a formula weight of 219g/mol calculate the molecular formula of the hydrate
A can of mineral water contains 345 mL of water. How many molecules of water does the can contain? (water = 1.00 g/mL)
Calculate the change in pH when 3.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq).
When dealing with Hydrogenation of Oils, does it matter which double C bond you hydrogenate if there are two or more to make the oil partially hydrogenated?
The following problem is based on the "Nutrition Facts" found on the wrapper of an energy bar, assuming a 2000 calorie diet. The energy bar contains 100 mg of sodium, which constitutes
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