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Sagot :
11.59 g chromium metal is plated out.
For example, Cr3+ requires 3 Faradays to plate 1 mole of Ion with charge 3+.
Faraday's constant states that there are 96500 C mol1 of electric charge in a mole.
19200 seconds are left in the given amount of time (320 minutes). coulombs equal 8 x 19200 coulombs per amps per second.
Cr's molar mass is 51.9961 g, or 96500 x 3 coulombs plates. To plate out 11.59 g of chromium metal, multiply 51.9961g Cr by 8 x 19200 coulombs, which results in 51.9961/(96500 x 3) x 8 x 19200 g Cr.
A pure material made entirely of one species of atoms, or a chemical element, is a species of atoms with a specific number of protons in their nuclei. Chemical elements, unlike chemical compounds, cannot be reduced through any chemical reaction into less complex molecules. An element's distinguishing characteristic is its atomic number, which is denoted by the symbol Z. Atoms of the same element are all represented by the same atomic number. [1] In the universe, chemical elements make up the majority of the baryonic matter (among rare exceptions are neutron stars)
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