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When 2.45g of an unknown weak acid (HA) with a molar mass of 85.0g/mol is dissolved in 250.0g of water, the freezing point of the resulting solution is -0.258 degrees C.
Calculate Ka for the unknown weak acid.
Describe at least 4 methods that could be used to attempt to separate the oil and water at home. Based on the four methods postulate which method would work better than the others.
If the total mass of H2O produced is 23.4 grams, what was the approximate mass of the methane in the original mixture?
A solution of potassium cyanide, KCN, instead of conc NH3 is added to copper(II) sulfate pentahydrate ([Cu(H2O4)]SO4.H20). Wrtie the formula of the expected complex ion.
You mix 50 ml of a weak monoprotic acid with 50 ml of NaOH solution in a coffee cup calorimeter. Both solutions and the calorimeter were initially at 22 C.
Identify the lattice type and all symmetry operations that are indicated by the space group symbol for the orthorhombic pbc21. Describe each of these fully.
what is reduced and what is oxidized in this chemical equation: Zn+2HCl yields ZnCl2+H2
Assuming levels of atmospheric CO2 are 390 ppm CO2, what is the pH of rainwater in equilibrium with the atmosphere for the pre-industrial atmospheric CO2 concentration of 280 ppm,v.
Show that wave function(x)=cos(npix/L+pi) is a solution to the schrodinger equation for a particle in a box with infinite potential at x=0 and x=l where n is an integer. Normalize the function. Test whether these wavefunctions are orthogonal for d..
A sample of ammonia, NH3, contains 3.3 x 1021 hydrogen atoms. What is the mass of this sample of ammonia
What chemical test can I do to distinguish between succinic acid and napthoic acid? Succinic acid is a dicarboxylic acid where as napthoic
how many kilograms does it take to sink a model barge with the following measurements in a calm pool; 300.00 cm * 25.00 cm * 68.00 cm with a mass of 850.0 grams
A student was in a hurry to leave the lab and recorded the melting point of the recrystallized trimyristin right after washing the crystals with cold acetone. The melting point range was 46 -50 degrees C. Is this a good result
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