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The specific rotation of (R)-(+)-glyceraldehyde is +8.7. If the observed specific rotation of a mixture of (R)-glyceraldehyde and (S)-glyceraldehyde is +3.2, what percent of glyceraldehyde is present as the R enantiomer?
What is the pH of a 0.15M solution of HCOOH formic acid if the Ka of formic acid HCOOH is 1.8x10^-4 at 25 degrees Celsius.?
Describe a non-chemical application of Le Chatelier's principle. What is the system in equilibrium. What is the stress. How does the system respond.
If a bottle of nail polish remover contains 181 g of acetone, how much heat would be released by its complete combustion? The density of acetone is 0.788 g/mL
You turn on a light bulb that emits only pure violet light (400.00 nm). You leave the light on for 60.0 seconds, and 1000. Joules of energy worth of light is emitted. How many photons were emitted by the light bulb during this 60 second period
Lakes that have been acidified by acid rain can be neutralized by the addition of limestone (CaCO3). How much limestone in kilograms would be required to completely neutralize a 5.2 x 109 L lake containing 5.0 x 10-3 g of H2SO4 per liter
Order the following compounds according to their expected lattice energies: LiBr, LiCl, LiI, KI, NaI, Express your answers as chemical formulas. decreasing expected lattice energy separated by commas.
How many moles of H3O+ or OH- must you add per liter of HA solution to adjust its pH from 9.45 to 9.02. Assume a neglible volume change
A certain reaction has an enthalpy of change in H = 54 kJ and an activation energy of Ea=81 kJ. What is the activation energy of the reverse reaction
Use balanced equations to determine whether either CuBr or Ca3(PO4)2 has a different solubility with a change in pH:
If the rate of 4HNO3 -->2H2O + 4NO2 + O2 is given by: rate = k[HONO2]^2, and nitrogen trioxide is a rxn intermediate, proposea 3-step mechanism for the rxn. Explain/defend your proposed mechanism as necessary.
calculate the solubility of caoh2 in a 0.469m cacl2 solution at 31degc given that the ksp of caoh2 is 4.96 x 10-6 at
If a triacylglycerol in peanut oil that contains one oleic acid and two linoleic acids is completely hydrogenated, draw the condensed structural formula for the product.
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