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Describe how to convert between the mass and the number of moles of a substance.
What is the equilibrium pH of a solution created by adding 10-4 moles of HCl to one liter of water?
If each of the following compounds were in solution, which of the ions contributed by that compound would the chloride electode measure?
How would you expect the amino acids glycine, alanine, and phenylalanine to travel relative to each other on the silica plates using a mixture of chloroform/methanol/ammonia? Explain your answer.
Starting with a concentration of 0.043 M for HI, calculate the concentrations of HI, H2, and I2 at equilibrium.
At 63.5 degrees celsius, the vapor pressure of water is 175 torr and that of ethanol, C2H5OH, is 400 torr. A solution is prepared by mixing equal masses of H20 and C2H5OH. What is the mole fraction of
A reaction has a rate law, rate = k[A][B]2. What is the overall order of the reaction?
What mass of glucose (180.0 g/m) must be added to 0.50 kg of water to increase the boiling point of the solution by 2.0 degrees C? (Kbp = 0.52 degrees C/mol)
Calcium nitrate and ammonium fluoride react to form calcium fluoride, dinitrogen monoxide, and water vapor. What mass of ammonium flouride is present after 15.0 g calcium nitrate and 17.50 g ammoniu
The titration of 35.0 mL of 0.250 M solution of Ca(OH)2 with 0.200 M HCl will require how many mililiters of the HCl solution for neutralization?
Predict the products of a reaction of the following acids and bases. Will the equilibrium favor the reactants of products in each case?
Imagine you are driving at speed 60 mph through air filled with bugs at concentration 1 per cubic meter. The windshield is a flat panel of area 2 m^2, perpendicular to the ground.
What effect would changing the concentration of para-toluenesulfonic acid have on the position of the equilibrium between 3-methyl-1-butanol, acetic acid, 3-methyl-1-butyl acetate, and water?
For the reaction, A = B + C, the rate law is k[A]. If it takes 80.0 seconds for 70.0% of a 10.0 gram sample of A to be transformed into products, what is the value of the rate constant?
What are the units to be for a third order reaction? (if time units are in minutes)
At 27 degrees celsius, the vapor pressure of pure water is 23.76 mmHg and that of an aqueous solution of urea is 22.99 mmHg. Calculate the molality of urea in the solution.
Buffers are typically made by combining a weak acid with its salt or by combining a weak base with its salt. Which of the following will be the other component present in a prepared buffer if one co
The heat capacity of the bomb is 8.151 J/K and the heat capacity of water is 4.184 J/g*k. Calculate the heat of reaction per mole of NaCl.
When 25.0 mL of 0.500 M H2SO4 is added to 25.0 mL of 1.00 M KOH is a coffee cup calorimeter at 23.50 degree Celsius, the temperature rises to 30.17 degree Celsius. Calculate the delta H of the react
A chemical reaction takes place inside of a simple constant pressure calorimeter that contains 100g of water. The temperature changes from 25 degrees C to 29 degrees C. What is the enthalpy (Δ
What mass of cesium bromide must be added to .500 L of water (d =1.00g/mL) to produce a 0.687 m solution? What are the mole fraction and the mass percent of CsBr?
The density of a particular brand of gasoline at room temperature is .70g/mL. If the gas tank of a car holds 10.0 gallons, what is the mass of a tankful of gasoline?
What is the pH of a solution containing 0.010 HCl plus 0.040 KClO4 with an activity coefficient of [H+] = 0.86?
Question: 6g of metal M react with 23.66g of chlorine to form 29.66g of the metallic chloride. Find the empirical formula of the metallic chloride. (M = 27,Cl = 35.5)
What is the freezing point in (C) the solution below? For water, Kf=1.86 (Ckg)/mol. The vapor pressure of water at 45.0 C is 71.93mm Hg.