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Hydrogen bonding does not make a significantly large contribution to the overall stability of the DNA molecule. Explain
A solution of 0.0385 M hypochlorous acid, HOCl, has a pH of 4.47. Calculate the acid dissociation constant Ka.
What is the atomic mass of an atom if its mass is approximately equal to the following?
oxygen gas is collected over water at 25 degrees C. The total pressure of the gas is 780.00 mm Hg. What is the partial pressure of the dry oxygen gas?
Which is the limiting reagent in the reaction between Copper sulfate pentahydrate and ammonia?
A gaseous mixture of and has a density of 1.104 at 445 and 300 . What is the mole percent in the mixture?
What does the volume correction constant (b) in the van der Waals equation represent? Why is b for helium small (b = 0.0238 L /?mol) compared to b for decane (C10H22, b = 0.3043).
Consider a 75.0g sample of H2O(g) at 125C. What phases are present when 215kJ of energy is removed from this sample?
In each of the following pairs of hydrocarbons, which one would you expect to have higher boiling points? And Why?
Kc = 9.7 at 900 K for the reaction NH3(g) + H2S(g) --> NH4HS(s) If the initial concentrations of NH3(g) and H2S(g) are 2.0 M, what is the equilibrium concentration of H2S(g)?
What is the reason for why a sand bath was used instead of a water bath for this particular pressure reaction? (a) Instructor preference (either could have been used with equal success).
constitutionally isomeric ketones that have the molecular formula C4H8O2
In a flame test experiment, sodium gives the brightest and most persistent color in the flame. Do you think that potassium could be detected visually in the presence of sodium
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