[tex]\bf \;[/tex]
[tex]\bf \rho = \dfrac{m}{V} =2,5\,\dfrac{g}{cm^3} \implies V=\dfrac{m}{\rho}[/tex]
[tex]\bf \;[/tex]
[tex]\bf V=\dfrac{m}{\rho}=\dfrac{10g}{2,5\dfrac{g}{cm^3}} = 4cm^3 = \boxed{\bf 4 \cdot 10^{-6} m^3}[/tex]
[tex]\bf \;[/tex]
[tex]\bf 10g=10:1000kg=0,01kg[/tex]
[tex]\bf \;[/tex]
[tex]\bf G=m \cdot g = 0,01kg \cdot 9,81 \dfrac{N}{kg} =\boxed{\bf 0,0981N}[/tex]
[tex]\bf \;[/tex]
#copaceibrainly