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For a particle in two-dimensional 1 box L1 = L2 = L tabulate the energy values in the lowest 4 energy levels (as multiples of E where E = H2 /8mL2) as well as degeneracy of each level.
How many grams (to the nearest 0.01 g) of NH4Cl (Mm = 53.49 g/mol) must be added to 550. mL of 0.906-M solution of NH3 in order to prepare
What is the hydronium-ion concentration of a 0.40 M solution of HCN (Ka= 4.9×10-10) at 25° C?
Given the following two half-reactions, write the overall balanced reaction in the direction in which it is spontaneous and calculate the standard cell potential.
Decribe how to prepare 2.0 liters of a .20 M NaOH solution from 50%. (w/w) Naoh solution that has a density of 1.53 g/mL, and doing all measurements by volume, not mass.
Calculate the pH of 0.075 M in sodium formate, NaCHO2, and 0.200 M in formic acid, HCHO2. The Ka for formic acid is 1.8x10-4
A sample of 54.7 g of HCl gas is dissolved to make 1L of solution. What is the molarity of the solution?
The complete combustion of ethanol to form water and carbon dioxide at constant pressure releases 1790 kJ of heat per mole of C2H5OH. C2H5OH(l)+3O2(g)-->2CO2(g)+3H2O(g)
aspartame c14h18n2o5 is a solid used as an artificial sweetener. its combustion produces carbon dioxide gas liquid
Aerosol cans carry clear warnings against incineration because of the high pressures that can develop upon heating.
The four molecular p orbitals of the four carbon atoms can be lined up parallel in order to create four new molecular orbitals. The electrons in the new molecular orbitals benefit because they are not confined to just one atom.
A compound of carbon, hydrogen, and oxygen contains 54.5% carbon and 9.10% hydrogen. what is its empirical formula
question what is the initial temperature degc of a system that has thepressure decreased by 10 times while the volume
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