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The diffusion coefficients for species A in metal B are given at two temperatures:

$($a$)$ Determine the value of the activation energy $Q_d($in $\frac{J}{m}ol).$

$\frac{J}{m}ol$

$($b$)$ Determine the value of $D_0.$

$($c$)$ What is the magnitude of $D$ at $1180C?$

$\frac{m^2}{s}($Use scientific notation.$)$

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