Question 64598 • AA-F26 Physical Science
The equation is already balanced with a coefficient of 1 for each substance: Ba, S, and H each appear equally on both sides, and the four O atoms on the left match the two in H₂O₂ plus two in BaSO₄. So the coefficients are 1, 1, 1, and 1; the correct choice is A) 1.
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