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Naphthalene (C10H8) is a solid aromatic compound often sold as mothballs. The complete combustion of this substance to yield CO2(g) and H2O (l) at 25oC yields 5154 kj/mol .
Calculate the pH at the points in the titration of 40.00 mL of 0.425 M NH3 for the reaction below. NH3(aq) + HNO3 ? NH4+(aq) + NO3?(aq) For NH3, Kb = 1.8x10-5.
What food contains an antagonist to biotin such that the biotin will be bound in the gut and not absorbed?
When a solution of sodium sulfate, Na2SO4, adjusted to a pH of 7 is electrolyzed, red litmus and a gas is evolved in the anodic chamber. In the cathodic chamber, red litmus turns blue and a gas is also evolved.
Calculate the pH of a solution that is .150 M in sodium formate and .200 M in formic acid (Ka=1.8*10^-4)
A beaker contains a solution that is 0.50M in Au3+ ion and 0.25 M in Ag+ ion. A solution of sodium chloride is slowly dripped into the beaker with stirring. Which ion will precipitate first, the gold or the silver
In the experiment "Separation of the Components of a Mixture" A student found that her mixture was 13% NH4Cl, 18% NaCl, and 75% Sio2. Assuming that her calculations are correct, what did she most likely do incorrectly in her experiment
What would account for the exothermicity that might occur when ammonium hydroxide is first added to the crude 4-acetamidobenzenesulfonyl chloride
how many hours are required in order to reduce 325 ml of a 0.481 m solution of cucl2 to 0.226 m in 0.226 m in cu2 using
A mixture of 0.200 mol of CO2, 0.100 mol of H2 and 0.160 mol of water is placed in a 2.00 L container. The following equilibrium is established at 500 K: Calculate the initial partial pressures of CO2,H2, and H2O
which compartment (A or B) will increase in volume for each of the following pairs of solutions separated by a semipermiable membranes: a) A.20%(m/v) starch B.10%(m/v) starch. b) A.10%(m/v) albumin B.2%(m/v) albumin. c) A. .5%(m/v) sucrose B. 5%(m..
You have a solution of NaCl dissolved in water. Describle a method by which these two compounds could be separated.
Calculate the ph change when 25 ml of 3.0 M HCl are added to 500 ml of a solution that is 0.10 M CH3COO
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