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A 26 mL sample of a solution of MgF2 was diluted with water to 75 mL. A 25 mL sample of the dilute solution was found to contain 0.04 moles of F-. What was the concentration of MgF2 in the original
How many milliliters of a 120 mL solution of 1.51 M BaCl2 must be used to make 16 mL of a solution that has a concentration of 0.3 M Cl-?
Calculate the minimum amount of dichloromethnae required to extract 99% of the 60 mg of caffeine dissolved in 50mL of tea in one extraction.
At least how many standard solutions would you need to make a calibration graph, assuming that the graph is expected to be a straight line
When 49 mL of a solution containing 3.1 M AlCl3 is diluted to 53 mL, a dilute solution is formed. How many moles of Al3+ ions are contained in 14 mL of the dilute solution
Atmospheric pressure decreases as altitude increases. In other words, there is more air pushing down on you at sea level, and there is less air pressure pushing down on you when you are on a mountai
When 26 mL of a 155 mL stock solution containing 2.1 M AlCl3 is diluted to 76 mL, what is the concentration of Cl- in the new solution
NO is produced in the atmosphere at moderately low partial pressure by high temperature combustion. What is its fate as cooling occurs? To help address the question, calculate the equilibrium consta
What is its fate as cooling occurs? To help address the question, calculate the equilibrium constant at 298 K and 1300 K for each reaction: ½ O2(g) + NO(g) <---> NO2(g)
The density of the unknown solution is 1.232g/mL. Calculate the specific gravity of the solution
Calculate the concentration of sugar in % (w/v) for 250-mL solution that contains 4.32g og sugar
If 100. grams of liquid water at 100.0 C and 200. grams of water at 20.0 C are mixed in an insulated container, what will be the final temperature of the water? The specific heat of water is 4.18 J/
The relative sweetness of sucralose is 60000. The relative sweetness of sugar is 100. How many grams of sucralose would you need for a solution that has the same sweetness as one made with 2.00g of
You are provided a neutral (pH 7.0) aqueous solution of citric acid, caffeine, and triethyl amine. Provide a flow chart for how you would isolate pure caffeine from this mixture using, calcium carbo
Write equations to show the products that form I the reactions of cyclohexene with potassium permanganate and bromine.
What would you observe if Cu2+ and Bi3+ was treated with 6M NHO3 rather than concentrated NH3
What would you observe in a sample which contains both silver and lead ions if the first precipitate (AgCl (s) and PbCl2 (s)) was not treated with hot water
Describe how the pseudo rate constant, k', is determined from the experimental data? Also describe how k, the true rate constant, is determined from the experimental data
How would the observed molarity of your experiment be affected by the following circumstances. (i.e. would it be higher than the true value, lwer than the ture vaule or remain unchaged?)
Complete and balance the following equation, and identify the oxidizing and reducing agent.(Write down each of the half reactions) Cr2O7^2-(aq)+Fe^2+(aq)-->Cr^3+(aq)+Fe^3+(aq) (acidic)
Oxalic acid dihydrate is often used as primary standard for the standardiztion of base solutions. For a procedure comparable to this experiment, approximately how many grams of oxalic acid dihydrate
Given this information, what is the order of reaction with respect to A and with respect to B? What is the value of the rate constant
A 100.0 mL sample of water from a salt lake has a chloride ion concentration of 0.25 M. Does AgCl (s) precipitate from solution if 5.0 mL of 0.10 M AgNO3 (aq) is added to the sample
For a protein w/ a molar mass of 1x10 6 u, calculate the molar concentration required to obtain an osmotic pressure of 10 matm at 25 degrees C.