Question

if two objects have the same density, but have different mass, which one has a larger mass

Answer 1

You can answer this by thinking about the relationship of density, \(\rho\) and mass, \(g\),

\(\rho\) = \(\frac{g}{L}\)

Answer 2

It's like the age old question: "What weights more a ton of bricks or a ton of feathers?"

The answer is they weight the same of course!

But bricks have a larger density so a ton of bricks occupies less volume than a ton of feathers.

Let's rephrase the question, "Which is bigger a ton of bricks or ten tons of bricks?"

Since both have the same density, we know that the pile of ten tons of bricks is bigger because it has the larger mass!