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That completely depends on what substance fills the cubic feet.

If it's air, then there are very few kilograms of mass in that space.

If it's water, then there are about 453 kilograms of mass in that space.

It's it's stones or gold, then there are a lot more kilograms of mass in it.

If the cubic feet are empty, then there are no kilograms in them at all.

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13y ago
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13y ago

Depends on the density of the material that takes up that space. 7 cubic ft of lead weighs more than 7 cubic ft of styrofoam

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12y ago

You can't convert between units that measure completely different things. Kilogram is a unit of mass, cubic foot is a unit of volume.

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Q: How many kilograms in 7 cubic feet?
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