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A 5.00-g sample of KBr at 25.0 C dissolves in 25.0 mL of water also at 25.0 C. The final equilibrium temperature of the resulting solution is 18.1 C. What is the enthalpy of solution, H, in kilojoules per mole of KBr?
consider the following mixtures. in each case either calculate the pH if the resulting solution is a buffer solution or state why the solution does
what is the molarity of an aqueous solution containing 360g of glucose in 2.0L of solution.
The decomposition of NO2 (shown below) has a KP = 4.8 × 10-6 at a certain temperature. If 1.36 atm of NO2 is placed in a flask at this temperature
Predict and explain the order of elution (fastest to slowest) of benzoic acid , biphenyl, phenyl acetate and benzyl alchol from an alumina column
An unknown mass of each of the given substances as with The final temperature is recorded as indicated 1.Pyrex glass (tf=67.6 C), 2.Sand (tf=70.4 C), 3.ethanol (tf=45.9 C), initially at 19.0 degrees celsius, absorbs 1930 Joules of heat
Organic chemists rely heavily on the spectroscopic methods of IR and NMR. Explain in great detail why the two methods have to be used in tandem to
Suppose that coal of density 1.5 g/cm3 is pure carbon. (It is, in fact, much more complicated, but this is a reasonable first approximation.)
Calculate the ratio of CH 3 NH 2 to CH 3 NH 3 Cl required to create a buffer with pH = 10.14. Express your answer using two significant figures.
Find the volume of oxygen - What volume of oxygen is needed to completely combust 2.07 L of methane gas
In a calorimeter of capacity =0, you mix 50g of water at 80°C with 100g of water at 10°C. What is the final temperature
How many grams of water can be cooled from 34°C to 26°C by the evaporation of 81 g of water? (The heat of vaporization of water in this temperature range is 2.4 kJ/g. The specific heat of water is 4.18 J/g·K.)
The Solubility of calcium arsenate, Ca3(AsO4)2 is 3.63 milligrams per 100mL. What would you expect the solubility product (Ksp) to be
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