This is an unknown number of atoms or molecules.
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n(1-R)L is an expression: it is not a formula.
Mean absolute deviation = sum[|x-mean(x)|]/n Where mean(x) = sum(x)/n and n is the number of observations. |y| denotes the absolute value of y.
n/(1/a1+1/a2+....+1/an)
n=6
well, first you use the formula and then you do A=formula problem sloved A=n*(n) A=the answer= to n times n