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What are the main branches of chemistry and explain two of these branches.
Compute the frequency of light (Hz) illuminating a copper surface if the threshold frequency of copper is 1.08 × 1015Hz as well as the velocity of the electron emitted is 8.17 × 105 m/s.
what is the ph of a solution that is 0.100 M in HCl and also 0.125 M in HC2H3O2? What is the concentration of the acetate ion in this solution?
At a given temperature the vapor pressures of benzene and toluene are 183mm Hg and 59.2mm Hg. Calculate the mole fraction of benzene in the vapor phase over a solution of benzene and toluene with Xbenzene=0.600
A liter and a half of water is boiling at 105.3C. Assuming standard pressure, how much mass KI must be in water
a fire pump delivers 1500 gallons per minute to a buildings automatic sprinkler system. during a structure fire the
Presume a reaction occurs in which 38mL of O2 (g) is created in a vessel at a temperature of 28C as well as pressure of 740 mm Hg. Explain how many moles of O2 were created
the hydrolysis of acetylcholine is catalyzed by the enzyme acetylcholinesterase which has a turnover rate of 25000 s-1.
a mixture of cs2g and excess o2g is placed in a 10.0l reaction vessel at 100.0 celsius and pressure of 3.oo atm. a
If the following reaction occurs, then what temperature will the water reach, assuming that the cup is a perfect insulator and that the cup absorbs only a negligible amount of heat
In a business environment, controlling who has access to business information and at what level is critical for facilitating day-to-day business operations. There are three levels of information access: no access, read access, and read-write access. ..
Ethylene glycol, HOCH2CH2OH, is used as antifreeze. It is produced from ethylene oxide, C2H4O, by the following reaction. C2H4O(g) + H2O(l) ? HOCH2CH2OH(l)
Liquid sodium is being considered as an engine coolant. How many grams of liquid sodium (minimum) are needed to absorb 4.00 MJ of energy (in the form of heat) if the temperature of the sodium is not to increase by more than 10.0 °C? Use CP = 30.8 ..
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