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An electron in the n = 7 level of the hydrogen atom relaxes to a lower energy level, emitting light of 93.1 nm. What is the value of n for the level to which the electron relaxed?
An acid solution is 0.120 M in HCl and 0.210 M in H2SO4.What volume of a 0.160 M KOH solution would have to be added to 550.0 mL of the acidic solution to neutralize completely all of the acid.
A solution is made by combining 10.0 mL of 16.5 M acetic acid with 5.60 g of sodium acetate and diluting to a total volume of 1.50 L. Calculate the pH of the solution.
The mixture was analyzed spectrophotometrically and found to be 1.84*10^-3 M in I3-. Calculate the molarity of I3- in the original sample
What is the approximate pH of a solution prepared by adding 20 mL of 0.10 M NaOH to 200 mL of 0.10 M HCl?
What is the relationship among intracellular fluids, 0.9% (W/V) NaCl and 5.0% (W/V) glucose?
Write the half-reaction that occurs at a hydrogen electrode in acidic aqueous solution when it serves as the anode of a voltaic cell?
Use balanced equations to determine whether either CuBr or Ca3(PO4)2 has a different solubility with a change in pH:
What is the molarity of a solution made by dissolving 74.8 g of strontium perchlorate in sufficient water
What mass of sodium hydrogen carbonate is needed to make the buffer solution 0.10 M in sodium hydrogen carbonate? pH is 10.1 pka is 10.33.
How much heat (in kJ) is evolved in converting 1.00mol of steam at 130.0C to ice at -50.0C? The heat capacity of steam is 2.01 and of ice is 2.09 .
Determine the product of the reaction. As a general rule, a metal will combine with a nonmetal to form an ionic compound.
a certain amount of NH4OCONH2 is placed in an evacuated rigid container and allowed to come to equilibrium. Calculate the total pressure in the container at equilibrium.
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