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Question 1) True or false. The thermocline is the depth at which there is the greatest temperature gradient.
Question 2) What does this equation represent? Select the TWO correct answers
2CuS (s) + 4H+ (aq) + O2 (g) = 2Cu2+ (aq) + 2S + 2H2O
A. Oxidation of copper by oxygen
B. Leaching (solubilisation) of copper in an acidic solution
C. Reduction of copper in a copper sulfide by oxygen
D. Oxidation of sulfur in the mineral copper sulfide by oxygen
E. Reduction of sulfur by oxygen
Problem- How long (in minutes) will it take to electroplate out 53g of Aluminum Metal from a solution of aluminum (III) ions using a current of 14.94 amps
At a pressure of O2 of 1.00atm, the mole fraction of dissolved O2 in water is 1.6x10^(-5) at 333 K. What mass of O2 (MM = 32.0) can dissolve in 250 g of water under 0.21atm of O2 pressure at 333 K
when a gold nugget with a mass of 521 g is added to 50.0 ml of water the water level rises to 77 ml what is the density of gold
How many grams of KNO3 are needed to make 450 mL of a solution that is to contain 5.50 mg/mL of potassium ion? Calculate the molarity of the solution.
What is the vapor pressure (in mm Hg) of a solution of 10.5g of urea, CH4N2O, in 151.0g of water at 45.0 C? The vapor pressure of water
How many moles of NaOH will need to be added to 100.0 mL of 0.100 M acetic acid to make a buffer with a pH of 5.00?
Calculate the amount (mL) of Compound A needed to give 12 mmol. MW of Compound A: 32.04 g/mol Density of Compound A: 0.79 g/mL
what metal cations form sulfide precipitates in basic solution in qual scheme after the above cations have been removed. Qualitativley explain, why the pH of the sulifide solution effects which cations precipitate.
In a separate experiment, it was found that, for fixed temperature and pressure, a 0.100 L sample of this compound takes 1.97 times longer to effuse than does a 0.100 L sample of Ar(g). What is the molecular formula of the compound? draw possible ..
At 25C, what is the hydroxide ion concentration, [OH-], in an aqueous solution with a hydrogen ion concentration of [H+]=2.7 x 10 ^ -6 M
The Ksp of tin(II) hydroxide, Sn(OH)2, is 5.45 × 10-27. Calculate the solubility of this compound in g/L.
The carbohydrate glyceraldehyde is shown below in several different Fischer projections. Sort the structures according to whether the Fischer projection represents glyceraldehyde
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