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How would you balance Na2O plus HOH

Na2O + H2O -> 2NaOH

Put this down in your memory bank.
metal oxide + H2O ==> base.

Earth is 1.5 x 10ü km from the sun and Pluto averages 5.9 x 10 km from the sun during its rather strange orbit.

How many years does it take Pluto to revolve around the sun?

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