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If you have 400mL of .5 M NH3, how many moles of .47 M HCl must be added to the ammonia solution to reach the equivalence point?
Kp for the reaction of SO2(g) with O2 to produce SO3(g) is 3 × 1024 . Calculate Kc for this equilibrium at 25ºC. (The relevant reaction is 2SO2(g) + O2(g) 2SO3(g).)
What is the osmotic pressure of a solution formed by dissolving 44.4mg of aspirin C9H8O4 in 0.355 L of water at 25 degress C.
A 29.0-g sample of water at 260. K is mixed with 48.0 g water at 340. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
Consider the titration of a 24.0 ml sample of 0.120 M HC2H3O2 with 0.105 M NaOH. Determine the initial pH.
Why is toxicity diminished in other congeners where chlorines are removed from the 2,3,7,8 positions, or when chlorines are added to remaining positions on the rings?
Two particles with charges q1 and q2 are separated by distance d. Rank these scenarios according to the magnitude of the electrostatic (coulombic) potential energy.
Calculate the amount of heat required to heat a 3.6 kg gold bar from 25 C to 64 C. Specific heat capacity of gold is 0.128 j/g C.
Chlorine consists of two major isotopes with the following atomic masses: 35Cl (34.9689 amu) and 37Cl (36.9659 amu). The average atomic mass of chlorine is 35.4527 amu.
Draw the accepted mechanism for each reaction and illustrate how each stereoisomer is formed in the reaction.
How much energy would be absorbed or re- leased by the H2O in the process 30 grams H2O(g) at 100?C → 30 grams H2O(l) at 20?C.
The half-life of Plutonium-239 is 24,000 years. If 10 gms are present now, how long will it take until only 10% of the original sample remains? Round your answer to the nearest 10,000th.
Two scientists are experimenting with pure samples of isotope X, a highly radioactive substance. The first scientist has a sample with a mass of 20 grams.
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