SOLVED:The mass of Earth's atmosphere is 5.3 ×10^15 metric tons. The atmospheric abundance of helium is 0.7 ppm when expressed as a fraction by mass instead of by volume, as in Table
Earth's Mass - Universe Today
SOLVED:The mass of Earth's atmosphere is 5.3 ×10^15 metric tons. The atmospheric abundance of helium is 0.7 ppm when expressed as a fraction by mass instead of by volume, as in Table
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