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What is the final volume in mL when 5.00 mL of a 12.0 M NaOH solution is diluted to each of the following concentrations? a).600 M NaOH. b)1.00 M NaOH. c)2.50 M NaOH.
determine the structures of Compounds A, B, C, D, and E. Show calculations. Support all of your structure determinations. Student performed a sodium borohydride reduction experiment.
Calculate the empirical and molecular formulas of a compound, C?H?Cr?, given the following: 1) The compund contains 73.94% C and 8.22% H. The rest is Cr. 2) At 25 degrees celius, the osmotic pressure of a solution containing 5.00 mg of the unknown..
Describe why this is based on the wavelength range that is transmitted. What color would you see if you mixed the two solutions with ?max = 520 and ?max = 610?
It required 71.5 mL of a 0.155 M KNO3 solution to fully react the copper in the ore sample. What was the percent copper in the ore.
Calculate the amount of heat liberated (in kJ) from 351 g of mercury when it cools from 88.0°C to 15.0°C.
A compound is known to have a free amino group with a pKa of 8.8, and one other ionizable group with a pKa between 5 and 7. To 100 mL of a 0.2 M solution of this compound at pH 8.2 was added 40 mL of a solution of 0.2 M hydrochloric acid.
Write the Bronsted-Lowry chemical equation describing how C2H5NH2 behaves when add to water. Indicate whether C2H5NH2 behaves as an acid or a base
Solar furnaces are designed to focus sunlight (say, with a parabolic mirror ) onto a relatively small area. given that the surface temperature of the sun is about 600K.
Suppose that the microwave radiation has a wavelength of 12.7 cm. How many photons are required to heat 200. mL of coffee from 25°C to 62°C?
Separate samples of an aqueous solution of an unknown ionic salt are treated with dilute aqueous solutions of hydrochloric acid, sulfuric acid, and potassium hydroxide. Precipitates are formed in all three cases.
A hypothetical element Z has two stable isotopes: Z-46 = 46.046 u 64.08% Z-51 = 50.826 u 35.92% What is the average atom weight of the element?
chromium metal reacts with 3.807 g of iodine. Using the conservation of mass law, predict the mass of product.
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