Question

Pls answer fast i will mark as brainliast and thanks.​

Answer 1

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the balloon us filled with a gas that is less dense than air

hope it helps

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Answer 2

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B). The balloon is filled with a gas less denser than air.

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The reasons for these differences in density stem from atomic and molecular properties. Oxygen is a diatomic gas where each molecule is made of two oxygen atoms, whereas helium is a monoatomic gas made up of individual helium atoms. The helium atoms are much smaller and lighter and much more weakly attracted to each other, so they tend to shoot around more rapidly and take up a larger amount of space at the same temperature. Air, by contrast, is a mixture of different gases including both nitrogen and oxygen.