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A compounds 'H NMR spectrum shows resonance at 9.28 and 7.50 ppm what possible structural subunit does the compound contain?
Draw structural formulas for the organic product(s) formed when the following compound is heated at reflux in an excess of concentrated HI
determine whether or not it is chiral and specify the absoute configuration of any chiral carbons
Consider a reaction for which DeltaS is positive and DeltaH is negative. Discuss briefly the conditions under which this reaction will NOT BE spontaneous.
Soft drinks are bottled under CO2 pressure of 4.0 atm. The solubility of CO2 at 4.0 atm is 0.71g/100g H2O. What is its solubility after the bottle is opened if the partial pressure of CO2 is 4.0e-4 atm
A sample of gas occupies 15.0 liters at 4.00 atmospheres and 300 K. What is the new volume of the gas if pressure is decreased to 2.00 atmospheres and temperature is increased to 400 K?
Calculate the mixing ratio (ppbv) of NO2. Assume T=20 degrees Celsius = 293 K; P = Atmospheric pressure. MW of NO2 = 44g/mol
What is the molarity of a solution prepared by dissolving 4.92 g of calcium nitrate, Ca(NO3)2, in 250 mL of water? (The molar mass of Ca(NO3)2 is 164 g/mol.)
A 0.100 M solution of a weak acid, HX, has a pH of 2.110. What is the value of Ka for HX?
Write out the additional equations you would need to consider. d. Confirm that the number of equations is equal to the number of unknowns.
Draw out the Lewis structures for H2CO3, HCO3-, and CO32-. Then determine the maximum number of equivalent resonance structures for each species. Note that carbon is the central atom in all three cases.
As it expands, it does 135.8 J of work on its surroundings at a constant pressure of 783 torr. What is the final volume of the gas?
Calculate the molecular weight of the unknown acid.
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