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What volume of 0.416 M Mg(NO3)2 should be added to 255 mL of 0.102 M KNO3 to produce a solution with a concentration of 0.278 M NO3¯ ions? Assume volumes are additive.
Determine the ammonia concentration of an aqueous solution that has a pH of 11.50. The equation for the dissociation of NH3 (Kb = 1.8 x 10-5) is
batteries are listed by their cranking power which is the amountof current that the battery can produce for 30 seconds.
A red laser pointer emits light with a wavelength of 660. What is the frequency of this light? 2.What is the energy of one of these photons?
Determine what is the density of the oxygen gas in the full bottle If A cylindrical gas lecture bottle has internal dimensions of 18.0 cm in diameter and a height of 49.0 cm and weighs 1.75 kg when empty.
reaction between copper and silver nitrate2agno3 cu 2ag cuno32beaker-66.88gcopper- 7.44gsilver nitrate- 1.60gwater
what is a cyanide based compound used in synthesis of methadone?
The next items refer to the result of mixing 400. ml of 0.10 M NaOH and 100.0 mL of 0.10 M Mg(NO3)2. Reaction as shown goes essentially to completion.
The acid-dissociation constants of phosphoric acid (H3PO4) are Ka1 = 7.5 × 10-3, Ka2 = 6.2 × 10-8, and Ka3 = 4.2 × 10-13 at 25.0 °C. What is the pH of a 2.5 M aqueous solution of phosphoric acid
Calculate the vapor pressure of water, in torr, above a solution prepared by dissolving 60.20 g of PbCl4 in 421.0 g of water at 343.0 K. The vapor pressure of pure water at 343.0 K is 233.7 torr.
a sample of air contains 72.75nitrogen 26.45 oxygen 0.05 carbon dioxide and 0.75 argon byvolume. how many molecules of
a gaseous system undergoes a change in temperature and volume. what is the entropy change for a particle in this system
Calculate the change in energy required in making 70.0 mL of water from its elements under standard conditions
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