Final answer:
Object 1 is denser than Object 2 because it has a higher density of 0.5 g/ml, compared to Object 2's density of 0.25 g/ml.
Step-by-step explanation:
To determine which object is more dense, we need to calculate the density of each object using the formula Density = mass / volume. For Object 1, with a mass of 25 grams and a volume of 50 ml, the density would be 25 grams / 50 ml, which equals 0.5 g/ml.
For Object 2, with the same mass of 25 grams but a larger volume of 100 ml, the density is 25 grams / 100 ml, which equals 0.25 g/ml. Therefore, Object 1, with a density of 0.5 g/ml, is denser than Object 2.