Question

If you place an item that is 2g/cm3 in a glass of water, will the object float or sink?

Answer 1

It will sink in that glass of water.
as, it's density is more than density of water.

you might be known that the density of water is 1g/cm^2 and it's given that the density of the item is 2g/cm^2,
and
An object only floats in water if it's density is less than that of water so,
that item is going to sink.