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The time dependent concentration of solute particles in a solution is given by
c(r, t) = [n/8(pi D t)^(3/2)] e^(-r^2 /4 D t)
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1) you need find out what is the molar mass of nickel 2) the mole # of nickel is 5.2*10^15 /(Avogadro's number6.0221415*10^23) 3)# of grams = (mole # )*(molar mass of nickel)
