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In an excess of NH3(aq), Cu2+ ion forms a deep blue complex ion, Cu(NH3)4 2+, which has a formation constant Kf=5.6×10^11. Calculate the concentration of Cu2+ in a solution prepared by adding 4.9×10^?3mol of CuSO4 to 0.480L of 0.35M NH3.
A green leaf has a surface area of 2.10 cm^2. If solar radiation is 1150 W/m^2, how many photons strike the leaf every second? Assume three significant figures and an average wavelength of 504 nm for solar radiation.
The activation energy for the isomerization ol cyclopropane to propene is 274 kJ/mol. By what factor does the rate of this reaction increase as the temperature rises from 256 to 297 oC.
If the pressure exerted by ozone in the stratosphere is 3 x 10^-3 and the temperature is 247 , how many ozone molecules are in a liter?
An unknown compound with a molecular formula of C8H18 reacts with chlorine in the presence of light and heat. From the reaction, only one compound with the formula C8H17Cl can be isolated. What is the structure of the original unknown compound?
How do old dispersive infrared (IR) instruments use a grating to separate the infrared source by wavelength before passing through the sample?
If an unknown crystalline organic compound has a heat of melting that is 8.605 kJ/mole and a melting point of 250.6 C
Rank the solutions from the highest to lowest pH.
.4550 g of rock containing douglasite is treated by AgNO3. it took 37.20 ml of 0.1000 M AgNO3 to precipitate all Cl- as AgCl. Calculate the % mass of the mineral in the sample
A 29.20 g piece of iron and a 25.30 g piece of gold at 100.0 degree C were dropped into 980.0 mL of water at 15.65 degree C. The molar heat capcities of iron and gold are 25.19 J/(mol degree C) and 25.41 J/(mol degree C), respectively.
A sample of oxygen occupies 10.0 L at 4.00 atm pressure. At what temperature will the pressure equal 3.00 atm if the final volume is 8.00 L.
"Crossed" or "mixed" aldol condensations are practical for synthesis, if one of the aldehydes (or ketones) has no alpha-hydrogen atoms. Explain.
calculate the heat absorbed or lost by the aqueous solution qaq in joules assuming that the specific heat capacity
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