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Freon-12, CF2Cl2, which has been widely used in air conditioning systems, is considered a threat to the ozone layer in the stratosphere. Calculate the root-mean-square speed of Freon-12 molecules in the lower stratosphere where the temperature is -65°C.
10g of CaCO3 are treated with a solution of HCl and 1.12 litre of CO2 are produced at STP . find out the number of moles of HCl in the solution
A 2.78 10-4 M solution of a compound has an absorbance of 0.451 at 520 nm in a 1.00 cm cell. The solvent's absorbance under the same conditions is 0.019. What is the molar absorptivity of the unknown compound
complete and balance the following redox equation. What is the coefficient of H2O when the equation is balanced using the set of smallest whole-number coefficients
Upon taking the IR spectra of decanedioyl chloride and nylon 6,10, which of the 2 molecules would you expect to have a higher C=O stretching frequency and why
The C-C bond in this structure should become the C2-C3 bond in (2R,3S)-2-bromo-3-phenylpentane. Type the name of an atom or group to add to the structure, or press the atom's button. Click on an H atom to replace that H atom with the atom or group..
Based on coulombic attractions, list the magnitude of attraction between ions from the least to highest. why? Nacl, Na2SO4, MgSO4
You wish to prepare a 0.5 liter solution of an acetate buffer having a pH of 5.0 and a concentration of .1M. The pKa of acetic acid is 4.74. How many moles of acetic acid and sodium acetate would you have to add to prepare this buffer
An unknown carbonyl compound tested positive when mixed with chromic acid solution. It also showed positive results in the iodoform test. Draw the structure of this compund
You are given a small piece of gold colored material and want to determine if it is actually gold. Using the Archimedes' Principle, you find that the volume is 0.40 cm3 and the mass is 6.0 g. What conclusions can you reach from your simple density..
Determine the energy of 1.20mol of photons for each of the following kinds of light. (Assume three significant figures.) infrared radiation (1480nm) visible light (520nm) ultraviolet radiation (130nm)
A 10.0 balloon contains gas at a pressure of 640 torr. What is the new pressure of the gas at the 22.0 liters volumes if there is no change in temperature.
A reaction in which and react to form products is zero order in , one-half order in , and second order in .By what factor does the reaction rate change if is doubled
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