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When electricity (the flow of electrons) is passed through a solution, it causes an oxidation-reduction (redox) reaction to occur. If the solution contains a metal cation such as \rm Ag^+, the flow of electrons will reduce the silver ion, causing solid silver to plate onto the electrode. The amount of metal plated depends on the number of electrons passed.
The total charge of a mole of electrons is 96,500 coulombs (\rm C) and
1 ampere (A) = 1 coulomb/second\; (C/s)
What mass of Cu{(s)} is electroplated by running 13.5 A of current through a {Cu}^{2+}{(aq)} solution for 4.00 \rm h?
How many minutes will it take to electroplate 36.1 g of gold by running 5.00 \rm A of current through a solution of {Au}^{+(aq)}?
Molarity of sodium carbonate, How many grams of primary standard grade sodium carbonate are necessary to prepare 2.00 L
What is the acceleration due to gravity at a point 5 cm from the center of a centrifuge rotor spinning
Nitrogen oxide is a pollutant in the lower atmosphere that irritates the eyes and lungs and leads to the formation of acid rain. Nitrogen oxide forms naturally in atmosphere according to the endothermic reaction: N2+O2=2NO(g) Kp= 4.1x10^-31 at 298..
Which of the following solvents, hexane, methylene chloride, acetone, or methanol will give the best seperation on a TLC plate of a mixture composed of
A bottle of wine contains 14.5% ethanol by volume. The density of ethanol (C2H5OH) is 0.789 g/cm3. Calculate the concentration of ethanol in wine in terms of mass percent and molality.
how much of this chemical would have been measured? Express in terms of measured concentration C (mg/litre) of the filtered sample?
When 35.0 g of an unknown nonelectrolyte is dissolved in 220.0 g of benzene, the solution boils at 83.2°C. Calculate the molecular weight of the unknown nonelectrolyte. The Kb for benzene = 2.53°C/m. The boiling point of pure benzene is 80.1°C.
2 NO(g) + O2(g) 2 NO2(g) In one experiment 0.633 mole of NO is mixed with 0.354 mole of O2. Calculate also the number of moles of NO2 produced.
Consider the following reaction at constant P. Use the information here to determine the value of ?Ssurr at 355 K. Predict whether or not this reaction will be spontaneous at this temperature.
Doubling the distance between an individual and the source of radiation reduces the radiation exposure to one-fourth the original value.
How many different signals are expected for this molecule? That is, how many magnetically different hydrogens are present in the molecule? This is in general determinted by differences in bonding, and distance to an electronegative group.
the reaction of copper(I) sulfide with oxygen gas as follows: Cu2(s) + O2(g) ? 2Cu(s) + SO2(g) If 0.330 kg of copper(I) sulfide reacts with excess oxygen, what mass of copper metal may be produced
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