The total charge $Q$ can be found by multiplying the charge density $\rho$ by the volume of the sphere $V$:
$Q = \rho V = \rho \frac{4}{3} \pi r^3$
where $r = 5.0 \,\text{cm} = 0.05 \,\text{m}$.
Now, we can find the electric field at a distance $r$ from the
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