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Balance the following redox equation using the smallest integers possible and select the correct coefficient for the Mn2+.Mn(s) + Cr2O72-(aq) + H+(aq) ? Mn2+(aq) + Cr3+(aq) + H2O(l)
1236
Determine whether or not each set of quantum numbers shown could correctly describe an electron in an atom. (Use the drop down menus to choose "POSSIBLE" or "IMPOSSIBLE" for each statement.
Silver carbonate will decompose when heated as shown in the unbalanced chemical equation below. An impure sample containing 84.1 % Ag2CO3 by mass is heated to produce 9.02 g of oxygen (O2). Calculate the mass of the impure sample used in the react..
How do you calculate the mass of KHC8H4O4 (molar mass=204.44 g/mol) that reacts with 15mL of NaOH solution
Why is the following not a redox reaction. Is it because it forms a solid. What are the charges for each
At what pH does the tripeptide, Ala-Val-Cys, have a net charge of -0.8? A. pH = 4.4 B. pH = 6.0 C. pH = 7.6 D. pH = 8.8 E. pH = 10.8
How many moles of urea (60. g/mol) must be dissolved in 100. g of water to give a 1.9 molal solution?
What is the molarity of the prepared naoh solution as determined in the titration? How many moles of OH are present when the end point is reached? What color should the solution appear at end point?
A 39.0 mL solution of 0.500 M Cd(NO3)2 is prepared. What mass of NaOH is needed to precipitate the Cd2+ ions from this solution?
What wavelength is expected for light composed of photons produced by an n=3 to n=1 transition in a hydrogen atom
74.0 mL of a 1.80 M solution is diluted to a volume of 268 mL. A 134-mL portion of that solution is diluted using 179 mL of water. What is the final concentration.
What volume (in mL) of 0.657 M solution of iron(III) chloride can be made from 52.3 mL of a 1.89 M solution? Assume the volumes are additive.
Consider: C7H16 (l) + 11 O2 (g) → 7 CO2 (g) + 8 H2O (l) ΔH°reaction=- 4130 kJ. How much energy is released when 4.000 moles of C7H16, is combusted?
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