Answer
$0.36 g.$
Work Step by Step
The total mass of the deposit is given by
$$
\int_{0}^{6} s(x) d x=\int_{0}^{6} 0.01 x(6-x) d x=\left.\left(0.03 x^{2}-\frac{0.01}{3} x^{3}\right)\right|_{0} ^{6}=0.36 g.
$$
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