Experimental proceedure for Separation of Chiral compounds by High performance liquid chromatograph.
Seperation science of enantiomers which are very difficult to separate otherwise.
Determine the pH of an aqueous solution prepared by mixing 50 mL of .125 M KOH with 50 mL of .125 M HCl while maintaining the temperature of the the system at 50 degrees C.
Thermochemistry (calculating final temperature of neutralization reaction)
A quantity of 2 x 102 mL of 0.862 Molar HCl is mixed with 2 x 102 mL of 0.431Molar Ba(OH)2 in a constant pressure calorimeter that has a heat capacity of 453 J/oC. The initial temperature of the HCl and Ba(OH)2 solutions is the same at 20.48oC. For the process H+(aq) + OH-(aq) H2O(L) the heat of ...continues
One significant figure and one conversion problem
1) How many significant figures are there in the answer to the following problem? (8.881*.02100) + .590? 2) A parsec is 206,265 times the distance from earth to the sun. If the distance is 8.000 million miles, express the distance of a parsec in miles in scientific notation.
Learning how to balance chemical equations.
What is the coefficient for water (H2O) when the following equation is balanced using the lowest whole numbered coefficients? Al(s)+ ____H20(l) --> Al(OH)3(s) + H2(g)
Using the ideal gas law to answer a pressure problem.
A 75.0L steel tank at 20.00 degree C contains acetylene gas, C2H2, at a pressure of 1.39atm. Assuming ideal behavior, how many grams of acetylene are in the tank?
How many moles of oxygen atoms are there in 3.00g of sodium dichromate, Na2CrO7?
Converting angstroms to picometers.
An angstrom is a non SI unit of measurement equal to 10^-10m. How many angstroms are equivalent to 259 picometers?
Determining which chemical compound has the largest mass.
Which substance contains the greatest mass of bromine? a) 60.0g NaBrO3 b) 30.0g MgBr2 c) 5.0g HBrO4 d) 0.10 mol KBr e) 0.10 mol HBr
Using mole stoichiometry to set up ratios.
How many moles of oxygen gas will react with 6.2 mol Al in the following reaction? 4Al + 3O2 --> 2Al2O3.
