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  1. Water is H2O. The solar wind is largely hydrogen .  The Moon has oxygen in its rocks.  ...

    3 Answers · Science & Mathematics · 27/10/2020

  2. Knowledge and/or understanding of gravity, global warming, hydrogen fusion, Kepler's and Newton's laws, the existence of...

    5 Answers · Science & Mathematics · 12/10/2020

  3. ...available than needed, it can be stored, or broken down to oxygen/ hydrogen for the fuel cells. 

    2 Answers · Science & Mathematics · 10/10/2020

  4. ...shift tells us how an object is; we know the frequency at which hydrogen absorbs and emits light; when we look for that in far-off objects...

    5 Answers · Science & Mathematics · 24/09/2020

  5. At constant temperature and pressure, volume ratio of gases is equal to their mole ratio. N₂(g) + 3H₂(g) → 2NH₃(aq) Volume ratio N₂ : H₂ = 1 : 3 If N₂ completely reacts, H₂ needed = (5...

    2 Answers · Science & Mathematics · 21/09/2020

  6. Yes.  While 99% of the sun is hydrogen or helium, there are more elements in it--almost all that are on...

    2 Answers · Science & Mathematics · 06/09/2020

  7. ... few people realize that our Sun will only use up ~10% of its Hydrogen during its entire lifetime. Therefore, the Sun will not "run...

    14 Answers · Science & Mathematics · 26/08/2020

  8. ...form one  >>larger galaxy.  True... and, as time goes on, hydrogen needed for new stars will reach a point where the element is so...

    7 Answers · Science & Mathematics · 11/08/2020

  9. ... will probably remain about the same, until the Sun runs out of hydrogen , in about five billion years.

    3 Answers · Science & Mathematics · 10/08/2020

  10. No.  Most elements are stable over a very long time.   Hydrogen created in the Big Bang almost 14 billion years ago...

    3 Answers · Science & Mathematics · 07/08/2020

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