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What is the percent yield of a reaction where 15.3g of oil of wintergreen is collected after 16.3g salicylic acid is reacted with an excess of
what is the percent of magnesium in magnesium phosphate?
when 50.0 mL of 0.5M NaCl solution is combined with 100.0mL of 0.20M Na2SO4 solution, what is the concentration of sodium ions in the final solution.
For the set of elements Li, O, Ne, and Na which element has the largest atomic radius? Explain any deviation from the expected pattern.
Calculate the wavelength at which this vibration will be found in the anti-Stokes scattering from a nitrogen laser(337nm).
Carbon-14 decays with a half-life of 5730 years. What is the first order rae constant for its decay in units of years^-1
a beam of 632.8 nm photons from a he-ne laser strikes a detector area of 5.0 mm2. the laser has a flux of 3.18 x 1015
the addition of h2 to cc double bonds is an important reaction used in the preparation of margarine from vegetable
A system conducts 238 cal of heat to the surroundings while delivering 331 cal of work. what is the change in internal energy of the system (in cal).
A synthesis gas at 500°C that analyzes 6.4% CO2, 0.2%O2, 40% CO, 50.8% H2, and the balance nitrogen is burnt with 40% dry excess air, which is at 25°C. The composition of the flue gas, which is at 720°C is 13% CO2, 14.3%H2O, 67.6% N2 and 5.1% O2. ..
Potassium nitrate has a lattice energy of -163.8kcal/mol and a heat of hydration of -155.5kcal/mol. How much potassium nitrate has to dissolve in water to absorb 117kJ of heat
A sample of propane gas occupies 625cm3 at 20 degrees Celcius and 750 torr. What is the final volume at -80 degrees celcius and 750 torr
Given Heisenbergs uncertainty principle, how can it be that it is so important for quantum mechanics, but not much of a concern for our every day actions
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