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Gallium arsenide, GaAs, has gained widespread use in semiconductor devices that interconvert light and electrical signals in fiber-optic communication systems. Gallium consists of 60.% 69Ga and 40.% 71Ga. Arsenic has only one naturally occurring isotope, 75As. Gallium arsenide is a polymeric material, but its mass spectrum shows fragments with formulas GaAs and Ga2As2. What would the distribution of peaks look like for these two fragments?
What is the pressure of a container that has 7 atm pressure coming from O2, 2 atm of pressure coming from N2, 3 atm of pressure coming from CO2?
Write the balanced net ionic equation for this reaction. How many H+ are there in the balanced equation?
Determine what amount of heat is required to increase the temperature of sixty grams of ethylene glycol from 15.1 degree Celsius to 40.3 degree Celsius?
What is the percentage purity of your ldh column fraction? 2. How many total mg of ldh are there in your column fraction?
If a few drops of water on the outside of the hot water syringe used to dispense the 5.00 mL sample into the calorimeter well for the Kcal determination fell into the well
Suppose that the microwave radiation has a wavelength of 11.6cm . How many photons are required to heat 225 mL of coffee from 25.0 C to 62.0C ? Assume that the coffee has the same density, 0.997 g/mL, and specific heat capacity, 4.184 , as water o..
In a gas mixture, the partial pressures are nitrogen 430 , oxygen 115 , and helium 235 . What is the total pressure ( ) exerted by the gas mixture?
equilibrium at 25C with 5.82L of an aqueous solution of N2O(aq). what is mass of N2O whic is disssolved?
slower than Friedel-Crafts alkylation of benzene and gives a mixture containing mostly o- and p-tert-butyltoluene. d. slower than Friedel-Crafts alkylation of benzene and gives mostly m-tert-butyltoluene.
Serum taken from a patient being treated with lithium for manic-depressive illness was analyzed for lithium concentration. A reading of 326 units was obtained for the intensity of the 671 nm red emission line.
A chemist wishes to determine the concentration of CrO42- electrochemically. A cell is constructed consisting of a saturated calomel electrode (SCE) and a silver wire coated with Ag2CrO4. The ° value for the following half reaction is +0.446 V rel..
a quantity of ice at 0.0 degrees Celsius was added to 33.6grams of water at 21.0 degrees Celsius to give water at 0.0 degrees Celsius. the heat of fusion of water is 6.01 kj/mol and the specific heat is 4.18 J/(g*celcuis) how much ice was added?
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