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A solution of Ba(OH)2 is standardized with potassium acid phthalate (abbreviated KHP), KHC8H8O4 (M = 204). If 1.530 g of KHP is titrated with 34.50 mL of the Ba(OH)2 solution, what is the molarity of Ba(OH)2? a. .0217 M b. .0435 M c. .109M c. .217M
what mass of this substance must evaporate in order to freeze 119 of water initially at 24? the heat of fusion of water
the standard electrode potentials calculate the standard free energy (kJ) for the given reaction.
Compare the energy of a photon of wavelength 3.4 um with that of wavelength 0.155 nm. answer is in E1/E2
How many water molecules are in a block of ice containing 0.750 mol of water (H2O)
An FM station broadcasts classical music at 89.1 MHz (megahertz, or 106 Hz). Find the wavelength (in m, nm, and A) of these radio waves. m nm A
The ionization energy of CO is greater than that of NO. Explain this difference based on the elctron configuration of these two molecules
Calculate the molar absorptivities for In- at 454 and 654nm, set up two simultaneous equations, and determine the molar concentrations of HIn and In- in the buffer solutions
How many gallons of ethanol can be produced per 100 tons (bone dry short ton) of dry corn stover. Assume the corn stover composition. 40% glucan, 30% xylan, 15% lignan, 10% ash. and 5% protein-others.
the freezing point of pure camphor is 178.4 degrees C, and its molal freezing-point constant, Kf, is 40.0 degrees C/m. Find the freezing-point of a solution containing 3.00 g of a compound (molar mass=125 g/mol) dissolved in 45.0 g of camphor
A 125-g piece of metal is heated to 288 oC and dropped into 85.0 g of water at 26 oC. If the final temperature of the water and metal is 58.0 oC, what is the specific heat of the metal (J/goC)
A patient needs 2.70×10^-2 of a sulfa drug. There are 8.00 tablets in stock. How many tablets should be given?
A substance (that you believe to be talc) contains 58.35 g magnesium, 89.88 g silicon, 153.6 g oxygen and 1.61 g hydrogen. How many grams of oxygen are present in 72.5 g of talc
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