Answer:
2,2 g/cm^3
Explanation:
According to your table, the platinum has 21,5 g/cm^3, and gold 19,3 g/cm^3
Doing the diference:
[tex]21,5 \frac{g}{cm^3} -19,3\frac{g}{cm^3}= 2,2 \frac{g}{cm^3}[/tex]
Porcentual expression:
[tex]\frac{2,2}{21,5}*100 =10,2%[/tex]
