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when a stip of zinc metal is placed in a blue aqueous solution of copper (II) sulfate, the surface of the zinc becomes coated with a reddish solid, and the zinc begins to dissolve to form aqueous zinc sulfate. Which of the following statements regarding this reaction is correct?
a. The copper(II) is being oxidized
b. The zinc is being reduced
c. the sulfate ion is being reduced
d. the solution will lose its blue color as the reaction progresses.
e. the reaction described is nospontaneous
A zero-order reaction has a constant rate of 2.90×10-4 M/rm s. If after 65.0 seconds the concentration has dropped to 9.00×10-2 M, what was the initial concentration.
What is the pH of 10 drops of triethylamine in a dropperful of demineralized water? How does the reaction between triethylamine and water explain the measurement of the pH?
What volume of .100 M NaCl is needed to react completely with 5.00mL of .200 M Pb(NO3)2.
How many grams of water can be cooled from 45 C to 23 C by the evaporation of 63 of water? (The heat of vaporization of water in this temperature range is 2.4 kJ/g . The specific heat of water is 4.18 J/g*K .)
Give the reaction scheme, showing the products formed (before hydrolysis), when one equivalent of ethylmagnesium bromide is treated with one equivalent of 5-hydroxy-2-pentanone
The Planck distribution gives the energy in the wavelength range dA at the wavelength A. Calculate the energy density in the range 650 nm to 655 nm inside a cavity of volume
A sample of neon has a volume of 575 mL when it is at a pressure of 751 mmHg. What will be the volume when the pressure is increased to 1262 mmHg?
A physiological saline solution contains 154mEq/L each of Na+ and Cl-. How many moles each of Na+ and Cl- are in 0.600L of the saline solution?
Mg3N2(s) + 6H2O(l) → 3Mg(OH)2(s) + 2NH3(g) How many grams of H2O are needed to produce 150 g of Mg(OH)2?
consider the following reaction. Mg+H3PO4 magnesium phosphate and hydrogen. what is the molecular formula for magnesium phosphate.
Calculate the standard-state entropy for the following reaction: 1 \rm CH_4(g) + 2 \rm O_2(g) \longrightarrow 1 \rm CO_2(g) + 2 \rm H_2O(l) (If applicable, coefficients of one have been included for clarity.)
Molecules can be as small as a few atoms or as large as thousands of atoms. In 1962, Max F. Prutz and John C. Kendrew were awarded the Nobel Prize for their discovery of the structure of hemoglobin.
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