11.3 thousand tonns, depending on lead cleaness
Lead has a higher density than concrete, so a 1"x1"x1" cube of concrete would weigh less than the same cube of lead.
Neither. Since they both have a weight of 1kg one cannot be heavier than the other.
A cube of platinum of the same size as a cube of silver will weigh more.
The answer depends on how big a cube.
It is water frozen in a shaped like a cube.
Iron is magnetic, lead is not.
Lead has a higher density than concrete, so a 1"x1"x1" cube of concrete would weigh less than the same cube of lead.
1.5 ug/metre cube
It is a bluish color in a cube like shape.
This refers to the density, which is a physical property.
This is impossible to answer as it depends on the density of the material. I.e. a 125 cm3 of lead is significantly heavier than a 125 cm3 cube of foam rubber.
Neither. Since they both have a weight of 1kg one cannot be heavier than the other.
Volume is the amount of 3-dimensional space occupied by an object and has nothing whatsoever to do with the molecular composition of the object. The volume of a 1" x 1" x 1" cube of lead is exactly the same as the volume of a 1" x 1" x 1" cube of butter or a 1" x 1" x 1" cube of anything for that matter. Lead and butter have a great many differences, but volume isn't a measure of any of them.
If by cube you mean perfect cube (a cube of an integer), then no, and the nearest perfect cube is 81.
A cube. A cube. A cube. A cube.
The cube root is the side of a cube.
The base of a cube is the bottom of a cube.