B. 133.88
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The 2 in front of
in
is <u>Coefficient.</u>
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The
after
in the same equation is <u>sub </u><u>script</u><u>.</u>
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There are two atoms of
in 
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Jets streams play a key role in determining the weather because they usually separate colder air and warmer air.
Answer:
2Mg^+ +O2 right arrow 2MgO
Explanation: