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Calculate thePH at the equivalence point in titrating 0.100 M solutions of each of the following with 9.0×10? HCLO2?
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A chemist makes 260. mL of silver(II) oxide AgO working solution by adding distilled water to 50.0 mL of a 0.000205 M stock solution of silver(II) oxide in water. Calculate the concentration of the chemist's working solu ...
2 moles of a compound are allowed to react ina foam coffee cup that contains 197 grams of water. The reaction caused the temperature of the water to rise from 21 to24.7 degrees Celsius. What is the enthalpy of this react ...
Calculate the boling point of a solution prepared by adding 11.5 g naphthalene (C10H8) to 250.0 g of benzene. Naphthalene is a non-electrolyte solute, and benzene is an organic solvent that exhibits a boiling point of 80 ...
A paint contains 180.0 ppm lead. Approximately what mass of lead will be in 1.00 cm ^3 of this paint when 1.00 gal is uniformly applied to 445.0 ft 2 of a wall. The density of the paint is 8.00 lb/gal.
What is the volume of a solution, in milliliters, that contains 1.5 g LiNO3 and has a concentration of 0.40 M?
Name five types of radiation. Describe, in table form, their mass number, charge, and identity.
How many formula units of Na2SO4are present in a 450 gram sample of the salt? Use 6.022×1023mol-1 or Avogadro's number. Report your answer in scientific notation. Your answer should have two significant figures.
A hydrogen atom emits a photon as its electron changes from n = 5 to n = 2. For the H atom, E n = -2.18E-18*(1/n 2 ) J. What is the wavelength (in m) of the photon? ( ) m The number of significant digits is set to 3; t ...
A 0.235g sample of a solid is 92.5% NaOH and 7.5% Ca(OH)2, by mass requires 45.6mL of a HCl solution for its titration. What is HCl molarity?
A student takes 5.0mL of a stock FeSCN2+ solution and dilutes it with deionized water to a volume of 50mL. He then puts the solution in a Spectronic 20 instrument and determines the the % transmittance of the new solutio ...
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