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Suppose a 10 mL sample of solution is to be tested for Cl- by adding .2 mL of .15 M AgNO3. What is the minimum number of grams of Cl- that must be present in order for AgCl(s) to form?
you found the amount of product (1.40 mol P2O5) formed from the given amount of oxygen and excess phosphorus. Now, determine how much P2O5 is produced from the given amounts of phosphorus and oxygen.
If you prepared a solution by adding equal numbers of moles sodium sulfite (Na2SO3) and sodium hydrogen sulfite (NaHSO3) to 50 mL water, what would be the pH of the solution?
The activation energy of the orginal pathway is 106 KJ/mol. What is the activation energy of the new pathway, all other factors being equal?
Although the aluminum cylinder is a solid (and, therefore, is quite in-compressible), it actually contains quite a bit of empty space.
the atomic mass of element x is 33.42 amu. a 21.83-g sample of x combines with 80.32 g of another element y to form a
question suppose that 450.9 j of heat energy is required to completely vaporize 3.1 g of a pure liquid. if the molar
Designate True (T) or False (F) for each of the following statements and a sample of an optically active substance that consists of a single enantiomer is said to have an enantiomeric excess of 100%.
Calculate the final pH when 2.6 mmole NaOH is added to 1 mmole phosphoric acid, given pKa1 = 2.1, pKa2 = 7.2 and pKa3 = 12.4
The Ka value for hydrocyanic acid is 4.9 x 10/\-10. Calculate the pH of a 0.095 M aqueous solution of HCN. The Kb value for pyridine is 1.7 x 10/\-9. Calculate the pH of a 0.050 M aqueous solution of C5H5N.
in an experiment a piece of magnesium ribbon is burned in air in a crucible. the mass of the mixture of mgo and
If the uncertainty in velocity of an electron is 4200.0 m/s, what is the minimum uncertainty in its position
After the addition of the ammonium ion to a dilute solution of ammonia containing phenolphtalein it became much paler. Please explain why with LeChatelier principles.
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