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Helium isn't usually sold by the gram, but by volume. Typical prices for a, say, 15 cubic foot container (that's 15 cubic feet at STP; the container itself is significantly smaller) would be around $50.

A cubic foot is about 28.3 L, so that's about $0.12 per liter. A mole of ideal gas at STP is 22.4 L, and a mole of helium would have a mass of 1 gram, so, roughly $2.70 per gram is about right.

As with most things, you can get a much better price if you buy in bulk.

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13y ago

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