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Calculate the wavelength (in nm) of a photon emitted by a hydrogen atom when its electron drops from the n=5 state to the n=3 state
If the groundwater at the top of the saturated zone is in equilibrium with air, calculate the concentration of m-Xylene in the air in mol/L
Identify the conjugate base of CH3COOH in the following reaction
Draw the mechanism of acetone reacting with 2 equivalents of benzaldehyde. Use the arrow drawing convention to show all bond making
The major reason that antiparallel beta-stranded protein structures are more stable than parallel beta-stranded structures is that
Calculate the pH of a buffer solution containing 0.65 M CH3COONa. Calculate the pH after 0.0010 mol HCl is added to 450.0mL of buffer.
Assume equilibrium with the calcium carbonate in the sediment and calculate the concentration of calcium ion
Calculate the equilibrium constant of the reaction I2(g)52 I(g) at 1000 K from the following data for I2: # = 214.36 cm
For the conversion of methyl isonitrile to acetonitrile in the gas phase at 250 oC CH3NC CH3CN the following data have been obtained
what fraction of the day's energy does walking one hour represent? How many kilograms of water would have to be evaporated if this were the only means of heat loss. (The heat of vaporization of water at 35 degree celsius is 2400J/g).
A litre of solution containing 0.1 M of CH3COOH and 0.1 M of CH3COONa provides a buffer of pH 4.74 . calculate the pH of a solution after the addition of 0.02 M of NaOH .
A source of energy releases 3000 calories. This changed the temperature of a mass of water from 25 C to 55 C. What is the mass of the water?
Preparation of Aspirin - All of them should be written in paragraphs and the method should not be copied exactely from the instruction
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