Answer:
Titanium metal.
Explanation:
Mass of ring = 9.45 g
Initial Volume = 25.3 mL
Final Volume = 27.4 mL
Volume of ring = 27.4 - 25.3 = 2.1mL
Density = Mass / Volume
Density = 9.45 / 2.1
Density = 4.5g/ml
Since, the ring is a single metal, we look for the metal that has a density of 4.5g/ml. This metal is the Titanium metal.