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Write an equation to represent the dissociation of Na2SO4 into ions in an aqueous solution. 5.3 grams of Na2SO4 are dissolved and diluted up to 350 ml. What is the final concentration of Na in moles/liter?
What is the maximum kinetic energy of an ejected electron if platinum metal is irradiated with 174-nm light? The threshold wavelength for a platinum metal surface is 212 nm.
Assume that the specific heat and density of the resulting solution are equal to those of water [4.18 J/(g \degrees Celsius}) and 1.00 g/mL] and that no heat is lost to the calorimeter itself, nor to the surroundings.
A helium-filled balloon has a volume of 2.75 L at 17 C. The volume of the balloon decreases to 2.36 L after it is placed outside on a cold day. What is the outside temperature in K?
the molecular orbital theory provide an explanation for the existence of the covalent molecule Na2 in the gaseous state. How would you predict Na2 by the Lewis theory?
Nitrosyl bromide (NOBr) gas decomposed to form nitric oxide gas and bromine vapor. A 0.64 mol sample of Nitrosyl bromide was placed in a 1.00 L flask containing no nitric oxide or bromine
Calculate the enthalpy change for the thermite reaction: 2Al(s) + Fe2O3(s)=2Fe(s)+Al2O3(s) ΔHrxn= -850kJ. when 12.0 mol of undergoes the reaction with a stoichiometrically equivalent amount of Fe2O3.
according to the following reaction how many moles of calcium oxide will be formed upon the complete reaction of 29.3
A multivitamin tablet contains 40 milligrams of potassium. How many moles of potassium does each tablet contain?
Ozone,O3 , is destroyed when ClO levels are high. ClO is likely formed from the decomposition of chlorofluorocarbons (CFCs) in sunlight. Standard enthalpies of formation for selected substances are given in the table below.
For a particular orbital, as one goes away from the nucleus along the z-axis, the probability desity decreases to zero, then increases, and finally decreases without increasing a second time. This is consistent with
What is the biological advantage (in KJ/mol of energy released as heat) of complete aerobic oxidation compared with anaerobic glycolysis to latic acid?
In either of the simple distillation experiments, can you account for the boiling point of your product in terms of the known boiling points of the pure components of your mixture?
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