0.222g of a divalent metal is deposited when a current of 0.45ampere is passed through a solution of its salt for 25min using appropriate electrodes calculate the relative atomic mass of the metal

Answer 1

an ampere is a Coulomb per second
... a Coulomb is 6.24 x 10^18 electrons

25 min * 60 s/min * 0.45 C/s * 6.24E18 e/C = ? electrons

find moles of electrons ... divide electrons by Avogadro's number

divide moles of electrons by two for moles of metal
... metal is divalent

divide grams of metal by moles of metal for relative atomic mass

Answer 2

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