A price list for uranium certified materials is at: http://www.nbl.doe.gov/htm/lists/certified_reference_materials_price_list.htm Industrial uranium is not so expensive, the price depend essentially of enrichment. As an example, uranium dioxide powder - natural uranium, nuclear grade for HWPR reactors, is about 70 $/kg but the price is very variable in time.
Uranium can be obtained with a purity greater than 99,99 %.
Since you have stated that the uranium is pure, it is therefore all uranium and contains no lead; lead is not uranium.
Uranium is a natural chemical element, a pure element.
Pure substance.
The surface of the pure and fresh (non-oxidized) uranium metal is similar to surface of a steel.
8 August 2011: 0,113 USD for 1 gram of the unrefinned oxide U3O8.
Uranium dioxide, nuclear grade, not enriched has a value greater 100 US $/kg.
Since you have stated that the uranium is pure, it is therefore all uranium and contains no lead; lead is not uranium.
The density of pure uranium metal is 19,1 g/cm3.
Uranium is a natural chemical element, a pure element.
Uranium is a natural chemical element, a pure element.
The answer is 15,2.1021 atoms of uranium.
156,86.1020 atoms of uranium in 6,2 g uranium
A pure and fresh prepared uranium sample don't contain plutonium; only the irradiated (in a nuclear reactor) uranium contain plutonium.
The density of pure uranium metal is 19,05 g/cm3.
Pure substance.
$1.00000000000
The density of pure uranium is ca. 19,1 g/cm3.