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using any diagrams that you wish to draw, explain how the Ocean Optics spectrophotometer works. Note: we are not asking how to operate the spectrophotometer.
Cobalt-60 is commonly used as a source of B-particles. How long does it take for 87.5% of a sample of cobalt-60 to decay, given that the half-life is 5.36 years?
Consider the reaction when aqueous solutions of sodium acetate and potassium sulfide are combined.
what is the volume of 1 mole of Helium gas when the pressure is 1.47 atm and the temperature is 287 K.
Consider an electrochemical cell constructed from the following half cells, linked by a KCl salt bridge. • a Fe electrode in 1.0 M FeCl2 solution
In a coffee-cup calorimeter, 1.50 g of NH4NO3 is mixed with 76.0 g of water at an initial temperature of 25.00°C. After dissolution of the salt, the final temperature of the calorimeter contents is 23.65°C.
The hydrogenation of Oleic acid to a steric acid. we used 10% pd/c, ammonium formate, mentanol, dichloromethane, 95% ethanol, and 1M sulfuric acid to get steric acid.
A growth factor for cells was identified from extracts of rat brain. Preliminary characterization was done on this activity using several methods.
How many moles of nitrate ions are present in a sample that contains 4.82 moles of chromium(III) nitrate, Cr(NO3)3
A solid mixture contains MgCl2 and NaCl. When 0.5000 g of this solid is dissolved in enough water to form 1.000 L of solution, the osmotic pressure at 25°C
circle the correct choices to indicate how many electrons each element must gain or lose to form an octet
Hydrocarbon chemistry problems, For the compound, 1,2-dibromoethane, the most stable conformation would be
H2 and Cl2 combine to form HCl. In a gas phase equilibrium mixture of H2, Cl2, and HCl at 300 K, [HCl] = 0.0036 mol/L and [Cl2] = 0.00485 mol/L.
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