Answer the following:
A common talcum powder contains \(4\ \%\) \(m/m\) zinc oxide, which acts as an antiseptic. How much zinc oxide is present in 287 \(g\) of the talcum powder.
Mass percentage of zinc oxide \(=\) \(\%\)
Total mass of talcum powder \(=\) \(g\)
Mass by mass percentage \(=\) / ) \(\times 100\).
So, mass of zinc oxide \(=\)
[Note: Enter your answer in whole number]