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What is the freezing-point depression of the solvent if the freezing point constant is -1.86 °C/m? Show all of the work needed to solve this problem.
0.2 M HCl is used to neutralize 20 mL of 0.35 M NaOH. How many moles of H+ are needed to neutralize the OH-?
Calculate the wavelength in picometer of gamma ray radiation whose frequency is 9.74 × 1019 Hz. Express answer in scientific notation.
A solution is prepared by dissolving 0.11 mol of acetic acid and 0.11 mol of ammonium chloride in enough water to make 1.0 L of solution.Find the concentration of ammonia in the solution.
If 358 mL of H2SO4 is neutralized with 60.0 mL of 1.50 M NaOH, what is the initial concentration of the acid?
78 mL of 2.5 M phosphoric acid is neutralized with 500 mL of potassium hydroxide. What is the concentration of the base?
A buffer that contains .39 M base B and 0.21 M of its conjugate acid BH+ has a pH of 8.95. What is the pH after 0.002 moles of HCl are added to 0.25L of solution
When titrating 0.15 M HCl with a calcium hydroxide solution of unknown concentration, 35 mL of acid are required to neutralize 25 mL of the base.
An aqueous vinegar sample contains 4.4% acetic acid by mass and has a density of 1.006 g/mL. Calculate the amount of acetic acid in grams in 750 mL of this vinegar.
A chemist dissolves 0.9 g of an unknown monoprotic (one acidic H) acid in water. She finds that 14.6 mL of 0.426 M NaOH are required to neutralize the acid.
A 25.00-mL sample of propionic acid, CH3CH2COOH, of unknown concentration was titrated with 0.104 M KOH. The equivalence point was reached when 35.31 mL of base had been added. what is the concentra
After balancing of the equation for the reaction under basic conditions, Bi2O3(s) + OCl-(aq) --> Cl-(aq) + BiO3-(aq) what is the sum of ALL the coefficients in the equation?
The second-order reaction 2 Mn(CO)5 Mn2(CO)10, has a rate constant equal to 3.0 x 10^9 M-1 s-1 at 25°C. If the initial concentration of Mn(CO)5 is 2.0 x 10-5 M, how long will it take for 90.% o
A sample of gas is collected over water at a temperature of 35 c when the barometric pressure reading is 742 torr. What is the partial pressure of the dry gas?
The small bubbles that form on the bottom of a water pot that is being heated (before boiling) are due to dissolved air coming out of solution.Use Henry's law and the solubilities given below to cal
Methane and air in stoichiometric proportions are brought into a calorimeter at 500K. The product compositions is brought to the ambient temperature of 298K by the cooling water.The pressure in the
Calculate the molar mass of the biomolecule. For carbon tetrachloride, the boiling-point constant is 5.03°C·kg/mol, and the boiling point of pure carbon tetrachloride is 76.50°C.
The balanced equation for this reaction is C3H8 + 5O2 --> 4H2O + 3CO2. What volume of carbon dioxide is produced when 2.8 L of oxygen are consumed?
The freezing point of t-butanol is 25.50°C and Kf is 9.1°C · kg/mol. Usually t-butanol absorbs water on exposure to air. If the freezing point of a 12.2 g sample of t-butanol is 24.5
In the barium chloride laboratory activity, what change occurred in the physical appearance of the barium chloride during the heating process?
What minimum mass of succimer (in {rm mg}) is needed to bind all of the lead in a patient's bloodstream? Assume that patient blood lead levels are 30 mu g/dL, that total blood volume is 5.0 {rm L},
. In the tin oxide laboratory activity, what was the color of the vapor emitted when the nitric acid was added to the tin?
Write a chemical equation for {rm HCl}(aq) showing how it is an acid or a base according to the Arrhenius definition.
At a certain temperature, the vapor pressure of pure benzene (C6H6) is 0.930 atm. A solution was prepared by dissolving 14.0 g of a non-dissociating, nonvolatile solute in 78.17 g of benzene at that
A 4 g sample of the hydrated crystal Ba(OH)2• χH2O is heated until all the water is removed. The remaining solid weighs 2.17 g. Calculate the formula of the hydrated crystal.