Answer:
11.3 g/mL.
Explanation:
d = m/V,
where, d is the density of the metal,
m is the mass of the metal (m = 12.475 g),
V is the volume that the metal takes up (V = 6.1 mL - 5.0 mL = 1.1 mL).
∴ d = m/V = (12.475 g)/(1.1 mL) = 11.34 g/mL ≅ 11.3 g/mL.
The significant figures has its rules in the calculations; the result has a significant figures to the lowest no. of significant figures (1.1 has two significant figures, while 12.475 has 5 significant figures), so the result should have only 2 significant figures.