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Determine which of the following kinds of light contain enough energy to break chemical bonds in biological molecules by calculating the total energy in 1 mol of photons for light of each wavelength.
visible light (500nm)
ultraviolet light (150nm)
infrared light (1500nm)
Determine the empirical formula and draw a possible structure for an organic compound with the elemental composition
starting with any alkane, alkene, or alkyne as your only organic reactant, propose a series of chemical reactions that will yield
The first step in industrial nitric acid production is the catalyzed oxidation of ammonia. Without a catalyst, a different reaction predominates: 4NH3(g) + 3O2(g) ? 2N2(g) + 6H2O(g) When 0.0230 mol gaseous NH3 and 0.0250 mol gaseous O2
A total of sixteen grams of steam at the temperature of 120 degree Celsius is admitted to the system. Determine the phase composition and temperature at the time when equilibrium is reestablished?
What mass of silver chloride can be produced from 1.27L of a 0.298M solution of silver nitrate
It takes 55.0 J to raise the temperature of an 10.3 g piece of unknown metal from 13.0C to 24.7 C. What is the specific heat for the metal?
Using words and pictures, explain why impurities usually lower the melting point of a substance. Next, imagine a case where an impurity actually RAISES the melting temperature of a pure substance
If the actual pressure of the vapour was less than the surrounding , will molecular weight you determine (heptane) be too low or too high
C6H5OH(s) + 7O2(g) --> 6CO2(g) + 3H2O(g) A 2.000 gram sample of pure phenol, C6H5OH(s), is completely burned according to the equation above.
the atomic mass of element x is 33.42 amu. a 21.83-g sample of x combines with 80.32 g of another element y to form a
What is the change in the cell voltage on decreasing the ion concentrations in the anode compartment by a factor of 10. What is the change in the cell voltage on decreasing the ion concentrations in the cathode compartment by a factor of 10
During a balloon ascension, wearing an oxygen mask, you measure the weight of a calibrated 5.00-kg mass and find that the value of the gravitational field strength at your location is 9.785 N/kg.
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