Step-by-Step Chemistry Tutorials for Easy Learning

a solution of a weak acid has a concentration of 0.0460 m. when a salt of the conjugate is added and the concentration of the conjugate is 1.31 m, then the percent ionization is 0.0054. what is the ph of the solution?
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Identify each substance as a strong electrolyte, weak electrolyte, or non-electrolyte.
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a neutral atom was accelerated to a velocity that was 10% the speed of light. the atom displayed scattering behavior consistent with a de broglie wavelength of 3.31 x 10-15 meters. what atom was accelerated?
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How many grams of the exess reactant remain assuming the reaction goes to completion and that you start with 15.5?
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What is the volume/volume percent concentration of a solution prepared from 12 ml of ethyl acetate in 410 ml of solution
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Calculate the ph of the solution resulting from the addition of 10. 0 ml of 0. 10 m naoh to 50. 0 ml of 0. 10 m hcn (ka = 4. 9 1010) solution
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A 0. 25 m solution of a salt nax(aq) has a ph of 11. 45. what is the ka of the hypothetical acid hx?
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An expanding gas does 147 J of work on its surroundings at a constant pressure of 1.04 atm. If the gas initially occupied 68.0 mL, what is the final volume of the gas
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Air at 50 oc and 80 kpa enters the diffuser of a jet engine steadily with a velocity of 500 m/s. the inlet area of the diffuser is 0.4 m2. the air leaves the diffuser with a velocity that is very small compared to the inlet velocity. determine the temperature (in oc) of the air leaving the diffuser.
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A pool is 37.1 m long and 40.5 m wide. if the average depth of water is 4.80 ft, what is the mass (in kg) of water in the pool? enter your answer in scientific notation.
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The ______ test is a nonparametric test used to compare the locations of two populations.
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A 22.02-mL solution containing 1.615 g Mg(NO 3 ) 2 is mixed with a 28.64-mL solution containing 1.073 g NaOH. Calculate the concentrations of the ions remaining in solution after the reaction is complete. Assume volumes are additive.
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a rigid container holds hydrogen gas at a pressure of 3.4 atmatm and a temperature of 50 cc. part a what will the pressure be if the temperature is lowered to -50 cc ? express your answer with the appropriate units. p2p2
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What is the product of the reaction of propanamide with methylmagnesium bromide (1 eq.)?
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What mass (in g) of nh3 must be dissolved in 759 g of methanol to make a 0.350 m solution?
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How could you tell by ir spectroscopy that cyclohexene converted into trans-bromocyclohexanol?
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A solution that has a greater hydronium concentration than hydroxide concentration will be:___.
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when electrophoretic separations are done based on molecular weight, the distance that a molecule moves can be graphed as a straight line when compared to:
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consider the reaction when aqueous solutions of ammonium phosphate and chromium(ii) acetate are combined. the net ionic equation for this reaction is:
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alcium reacts with sulfur forming calcium sulfide. what is the theoretical yield (g) of cas(s) that could be prepared from 1.61 g of ca(s) and 4.86 g of sulfur(s)?
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1. a) draw linoleate, which is 18:2cd9,12. draw the structure at ph 7. be sure to draw the c's and h's that are part of the double bond. b) what is the difference between linoleic acid and linoleate?
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interstellar gas is composed mainly of group of answer choices ammonia, methane, and water vapor. some hydrogen, but mainly carbon dioxide. only hydrogen. 90% hydrogen, 9% helium by weight. 10% hydrogen, 90% helium by numbers of atoms.
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how many liters of the standardized naoh in question 2 will be needed to neutralize a water solution with 0.1453 g oxalic acid dissolved?
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liquid hexane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . suppose 16. g of hexane is mixed with 42.2 g of oxygen. calculate the maximum mass of water that could be produced by the chemical reaction. round your answer to significant digits.
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