Reconstruct the sentences 🧩🌬️
Sentence 1:
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of dioxygen O2.
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of dinitrogen N2 than
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four times more
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Air contains
Sentence 2:
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with very
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that can pass through
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a sheet of paper
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small holes.
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molecules
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Air contains
Sentence 3:
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one billionth
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i.e. 10-9 m.
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is equal to
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One nanometre (nm)
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of a metre,
Next exercise 🔀