Question

how many kilograms of helium is needed to lift 1 kilogram of object

Answer 1

Answer:

to lift 1 kg of weight we need 1/6.25 kg of helium.

Explanation:

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Answer 2

Answer:

Multiplying by 250, we have that 6125 liter of He is the volume of 1 kg Helium. This displaces air which has a density of 1.18 gram per liter, or 7.25 kg of air, yielding a net upward force of 6.25 kgf. So to lift 1 kg of weight we need 1/6.25 kg of Helium, 160 gram or 0.16 kilogram.