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Define the human eye is a complex detector for visible light. The optic nerve requires a minimum of 2.0 x 10-17 J of energy to trigger a series of impulses that ultimately reach the brain. Explain how many photons of blue light 9 475 nm) are needed?
An aqueous solution contains 12.5% NaCl by mass. What mass of water (in grams)is contained in 2.5L of the vapor above this solution at 55 celcius? the vaor pressure of pure water at 55 celcius is 118 torr.
In the laboratory you dissolve 16.7 g of barium chloride in a volumetric flask and add water to a total volume of 125 mL. What is the molarity of the solution
A certain microwave delivers 750. watts (J/s) of power to a coffee cup containing 50.0 g of H2O at 25 degrees C. if the wavelength of microwave in oven is 9,75 cm how long does it take and how many photons must be absorbed to make H2O boil
a student titrates 50.0ml of apple juice and reports the following in the titration to the phenolphthalein end point with 0.1011 M NaOH.
If, in a certain experiment, over a specific time period, 0.0033 mol PH3 is consumed in a 1.5-L container each second of reaction, what are the rates of production of P4 and H2 in this experiment?
Given that the sample is a mixture of multiple chemicals and you are NOT given a mixture of KNOWN quantities, what experiement(s) should we do to create our own KNOWN data
A cooling system is designed to maintain a refrigerator at -10 degrees C in a room at 25 degrees C. If 3x10^4 J of heat leaks into the refrigerator every minute, and the system works at 60% of it's maximum thermodynamic efficiency, what is the pow..
What is the minimum pressure in kPa that must be applied at 25 °C to obtain pure water by reverse osmosis from water that is 0.154 M in sodium chloride and 0.030 M in magnesium sulfate. Assume complete dissociation for electrolytes.
The rate constants of some reactions double with every 10 degree rise in temperature.Assume that the reaction takes place at 345K and 355K.what must the activation energy be for the rate constant to double as described
Why is the 1, 4-isomer (1, 4-di-t-butyl-2, 5-dimethoxbenzene) the major product in the alkylation of dimethoxybenzene. Would you expect either of the following compounds to be formed as side products
Calculate the heat in joules when 89.19 g of ice at 100.0 K is turned into liquid water at 10.0 degrees Celsius.
what is the partial pressure of NOCl which reacted in order for the partial pressure of NO to be .084 atm? what is the partial pressure of Cl_2 at equilibrium what is the magnitude of K_p for the equation above?
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