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What is the PH of 1L of 0.30 M Tris, 0.60 M TRISH+ Buffer to which one has added 5.0 ml of 12.0M NH3 in enough water to make 1.00l of solution? the Kb for ammonia is 1.8 X 10^-5
The MRI (magnetic resonance imaging) body scanners used in hospitals operate with 400 {rm MHz} radiofrequency energy. How much energy does this correspond to in kilojoules per mole?
The elemental mass percent composition of malonic acid is 34.63% C, 3.87% H, and 61.50% O. Determine the empirical formula of malonic acid. Express your answer as a chemical formula.
a 20-g mass of argon occupies 15.0 l at a pressure of 25 kpa . find the volume of the argon when the pressure is increased to 530 kpa.
Metallic aluminum reacts with MnO2 at elevated temperatures to form manganese metal and aluminum oxide. A mixture of the two reactants is 67.2% mole percent Aluminum. Find the theoretical yield (in
what is the chemical formula of a homonuclear diatomic ga if it has a pressure of 1.40 atm and a density of 1.82 g/l at 27 c
The label on liquid Gaviscon states that each tablespoon (15 mL) contains 95 mg of Al(OH)3 and 412 mg of MgCO3. How many moles of acid can be neutralized by 1 tablespoon of Gaviscon?
How many milliliters of 0.105 M HCl are needed to titrate each of the following solutions to the equivalence point:
Zn (s) + 2HCl (liq) -> H2 (g) + ZnCl2 (s), How many moles of ZnCl2 form when 6.3 mol of Zn reacts?
Compouds A and B are alcohols with the molecular formula C3H8O. Deduce the structure of each alcohol (Structure of A and structure of B)
What is the Skeleton Equation for heating copper(II) sulfide in the presence of diatomic oxygen produces pure copper and sulfur dioxide, and water?
What mass of sucrose should be combined with 508 of water to make a solution with an osmotic pressure of 8.60 at 310 ? (Assume the density of the solution to be equal to the density of the solvent.)
How do the densities of metals can be calculated? Could this method be used for determining the density of mercury as well? Briefly explain your answer.
When 10.0 g of potassium bromide dissolve in 50.0 g of water in a coffee-cup calorimeter, the temperature drops from 18.0°C to 9.5°C.
If 122 mL of a 1.2 M glucose solution is diluted to 550.0 mL, what is the molarity of the diluted solution?
Calculate the pOH and pH at 298K of solutions having the following ion concentrations.
if 1.500 g of solute that has a molar mass of 125.0 g were dissolved in 35.00 g of camphor, what would be the resulting freezing point of the solution?
Arrange the following in order of increasing vapor pressure:
When [dye] = 4.0 x 10-5 M the rate is determined to be 1.71 10-7 M. What is the apparent order with respect to the dye ("a" in the rate equation)?
A sample of calcium carbonate [CaCO3 (s)] absorbs 45.5 J of heat, upon which the temperature of the sample increases from 21.1°C to 28.5°C. If the specific heat of calcium carbonate is 0.82
How many grams of methane gas (CH4) need to be combusted to produce 12.5 L water vapor at 301 K and 1.1 atm? Show all of the work used to solve this problem.
How much energy (in kilojoules) is released when 33.0 {rm g} of ethanol vapor at 95.0^circ {rm C} is cooled to -19.5^circ {rm C}?
A helium-filled weather balloon has a volume of 815 L at 22 oC and 752 mmHg. It is released and rises to an altitude of 7.16 km, where the pressure is 364 mm Hg and the temperature is -25oC. What i
Consider a particle in a one-dimensional box of length L in its lowest energy (ground) stationary state. Calculate the probability that the particle is
At a particular temperature and [A]0 = 2.57 10-3 M, concentration versus time data were collected for this reaction, and a plot of 1/[A] versus time resulted in a straight line with a slope value of +