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What are the coefficients for the following reaction when it is properly balanced? What are the...

What are the coefficients for the following reaction when it is properly balanced? What are the coefficients for the following reaction when it is properly balanced?

_HCl+_Mg +MgCl2+_H2

2, 1, 1, 1

2, 1, 2, 2

1, 2, 1/2, 1

1, 1, 1, 2

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