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1. Which statement about Ka is true?
a.) It represents a proton concentration at which 50% of the titratable group is in the acid form and 50% is in the base form.b.) If the proton concentration is less than the Ka, more than 50% of the titratable groups are protonated.c.) If the proton concentration is greater than the Ka, more than 50% of the titratable groups are unprotonated.d.) If the proton concentration is less than the Ka, more than 50% of the titratable groups are in the acid form.e.) All of the above are true
2. If you compare D-galactose to L-galactose, all groups attached to the carbon skeleton of the D-galactose are on the opposite side compared to L-galactose.a.) True b.) False
The flasks is opened, and the gases are allowed to mix thoroughly, the following reaction proceeds at constant temperature. What is the resulting total pressure of gases in now-joined flasks after the reaction proceeds to completion
determine how many grams of solute would separate if the quantity of the solvent is 129 grams if a saturated solution
a 55.0g piece of copper wire is heated, and the temperature of the wire changes from 19.0C to 86.0C. The amount of heat absorbed is 1.4 kilojoules. What is the specific heat of copper?
Experimentally the ionization energy of hydrogen is 1312.2 kJ / mol. What would be the wavelength (nm) of a photon with enough energy to ionize one atom of hydrogen
What is the stoichiometric coeffiecient for oxygen gas when the following reaction is balanced using the smallest whole number coefficients? C12H26(g) + O2(g) --> CO2(g) + H2O(g)
Predict the sign of delta S for each of the following changes.
Which of the following statements concerning the determination of crystal structure by x-ray diffraction is incorrect? X-rays are reflected from the repeating planes of an ordered crystal lattice
Assuming complete dissociation of the solute, how many grams of \rm KNO_3 must be added to 275 \rm mL of water to produce a solution that freezes at -14.5 ^\circ {\rm C}? The freezing point for pure water
To what final concentration of NH3 must a solution be adjusted to to just dissolve .060 mol of NiC2O4 (Ksp: 4x10^-10) in 1L if sikution. Neglect the hydrolsis of C2O4 because the solution will be quite basic.
A solution of 75.0 g of benzene (C6H6) and 75.0 g of toluene (C7H8) has a total vapor pressure of 80.9 mmHg at 303 K. Another solution of 100.0 g benzene and 50.0 g toluene has a total vapor pressure of 93.9 mmHg at this temperature.
What is the energy difference between the staggered and eclipsed conformations of 2,2,-dimethylpropane if the eclipsing cost of Me and H is 6 kJ/mol
Compound X has partition coefficient of 3 between ether and water. If 100 ml of 0.01 M aqueous solution of X is extracted with ether, then what fraction of X remains after
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