[tex]V_{c}=V_{H_{2}O}+V_{Pb}+ V_{Fe}\\\\
V_{H_{2}O}=367mL\\\\\\
V_{Pb}:\\
m=5g\\
d=11,34\frac{g}{mL} \ \ \ \Rightarrow \ \ \ V=\frac{m}{d}=\frac{5g}{11,34\frac{g}{cm^{3}}}\approx0,441mL\\\\\\
V_{Fe}:\\
m=3,2g\\
d=7,874\frac{g}{mL} \ \ \ \Rightarrow \ \ \ V=\frac{m}{d}=\frac{3,2g}{7,874\frac{g}{mL}}\approx0,406mL\\\\\\
V_{c}=367mL + 0,441mL+0,406mL=367,847mL[/tex]