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OpenStudy (anonymous):
The density of hydrogen is approximately 9 × 10-5 , while the density of helium is approximately 2 × 10-4 . Which of the following is true? The density of hydrogen is approximately 20 times the density of helium. The density of helium is approximately 2 times the density of hydrogen. The density of helium is approximately 20 times the density of hydrogen. The density of hydrogen is approximately 2 times the density of helium.
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