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Kilogram.
Concrete is made from cement. This normally comes in 20 kg bags. So the answer is kilograms. A kilogram is roughly 2.2 pounds.
That depends what substance you have a kilogram of.A kilogram of air fills many many cc.A kilogram of water fills only 1,000 cc (1 liter).A kilogram if ice fills a few more cc than a kilogram of water does.A kilogram of lead, gold, or rock fills only a small number of cc.
Yellow,Green,Blue,Orange,Red and Brown,
1,000,000,000,000 nanograms are in one kilogram.