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You conduct an experiment where you use a single battery with a charge capacity of 900 mAh to precipitate an unknown metal from a salt solution that was leaking from an old battery. You use a vast excess of the salt, so the amount of metal condensed is limited by the battery. You obtain 3.368 g of the metal. You can assume that the metal was the only substance being reduced in the electrochemical cell and 100% of the listed battery charge is useable. If you were able to determine that the metal ion was a +2 ion, then which metal is it? This metal was used in batteries for a long time (even in "alkaline" batteries) due to its good electrochemical properties, but it is now being phased out. Why?
Standard reduction potentials for nickel(II) and copper(II) The standard reduction potential for a substance indicates how readily that substance gains electrons relative to other substances at standard conditions.
Problem- 2C2H6 (g) + 7O2 (g) ? 4CO2(g) + 6H2O (g) ?H = -1560 kJ How much energy (in kJ) is released if 15.6 g of ethane undergoes combustion
when hydrochloric acid reacts with magnesium metal hydrogen gas and aqueous magnesium chloride are produced. what
The standard change in gibbs free energy= -69.0 kJ/mol. What is the change in G for this reaction at 298K when the partial pressures are PNO=0.100 P02=0.350 PN02=0.700 atm
What is the pH of a 2.025 M solution of the weak acid H3A? [Note: H3A has K1=3.429x10-6, K2=2.914x10-10, and K3=6.738x10-12
electrons and the quantity of electrons it has is the maximum. Calculate its mass number and a number that matches with the 34 neutrons it has.
Suppose that, from measurements in a microscope, you determine that a certain bacterium covers an area of 1.50μm21.50\; \mu \rm m^2. Convert this to square meters
Vinegar is 5% acetic acid and its molarity is 0.833M. Is the concentration of the hydronium ion in vinegar greater than, less than, or equal to 0.833 M--why or why not. Explain why it is incorrect to directly calculate the pH of vinegar from the m..
Hg(NO3)2(aq) + Na2S(aq) --> HgS(s) + 2 NaNO3(aq) If 50.0 mL of 0.0100 M Hg(NO3)2 is reacted with 20.0 mL of 0.100 M Na2S, how many grams of solid HgS will form
All of the following statements describe 64g of gaseous sulfur dioxide at 0C and 76 cm Hg pressure except. a. 22.4L of gas
Why is the word aquation used in the title of this experiment?The aquation of the tris-(1,10-phenanthroline) iron(11) Cation in aqueous acid solution
how many grams of sodium ion na are in 2.50 g toothpaste. a toothpaste contains 0.24 by mass sodium fluoride used to
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