9th grade science

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1)write the fomulas for the following compound:
Magnesium hydroxide.
2)Write the names of the compound:
Ba(ClO3)2 *the numbers are the subscripts*

I really don't understand how to do those two, I did the rest of them. I could really use the help. THANKS!!

  • 9th grade science -

    The answer is MgOH-1.

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