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# Calculation: Electroplating of Chromium

CHEM-E1NOPN

What mass of chromium metal from molten $Cr{O}_{3}$ can be plated in 1.0 h with an applied current of 62 mA?

The molar mass of $Cr$ is 52 g/mol and the molar mass of $Cr{O}_{3}$ is 100. g/mol.

A

$20.\ mg$

B

$39\ mg$

C

$40.\ mg$

D

$77\ mg$