3. If the reaction Mg+o2=mgO were balanced, what would the coefficients be?

A. 2Mg, 1 O2, 2MgO
B. 2Mg, 3 O2, 2MgO
C. 1Mg, 2 O2, 1MgO
D. 3Mg, 2 O2, 1MgO

1 answer

B. 2Mg, 3 O2, 2MgO

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