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Describe any important differences between benzopinacol and benzopinacolone in the IR and HNMR spectra.
A 158-mg sample of Na2CO3 is dissolved in H2O to give 3.00L of solution. What is the concentration of Na+ in parts per million (ppm)?
When 35.0 g of an unknown nonelectrolyte is dissolved in 220.0 g of benzene, the solution boils at 83.2°C. Calculate the molecular weight of the unknown nonelectrolyte. The Kb for benzene = 2.53°C/m. The boiling point of pure benzene is 80.1°C.
What is the value of Kc for the reaction 2A(g) + 3B(g) 2C(g) + D(g) if at equilibrium [A] = 0.60 M, [B] = 0.30 M, [C] = 0.10 M and [D] = 0.50 M? A) 0.088 B) 0.51 C) 2.4 D) 0.15
what mass of sucrose should be combined with 501 g of water to make a solution with an osmotic pressure of 8.85 atm at 305 K? (assume density of solution is equal to the density of the solvent).
Nitrogen reacts with a metal to form a compound in which there are three atoms of the metal for each atom of nitrogen. If 1.486 g of the metal reacts with 1.000 g of nitrogen
Given the reactant side of the total ionic equation for the neutralization reaction of ammonium hydroxide (NH4OH) with hydrochloric acid (HCl), write the total ionic equation
A buffer is made by mixing HCN and KCN to give a solution whose pH is 9.49. If the KCN molarity is 0.20 M, what is the molarity of the HCN?
draw the stuuctural formula of your drug C13 H21 NO3 albuterol. Highlight any regions of your drug that are nonpolar
What would be the freezing point for a 0.35m solution of sodium bromide in water? (Hoff factor = 1.75)
Find the pH and fraction of dissociation of a 0.100 M solution of the weak acid HA with Ka= 1.00 x 10-5.
Assuming that the loss of ability to recall Chem 401 material is a first-order process with a half-life of 55 days for the traditional (talking head lecture) and a C of 305 days for the active approach,
The value of deltaH for the reaction below is -72kj .how much of heat is released when 3.0 mol of HBr is formed in this reaction . is the reaction exothermic or endothermic
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