User:Alex
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[math]\displaystyle{ 18a - 21b \gt x*2 }[/math]
[math]\ce{ {Ba^2} + SO4^{2-} -> BaSO4 v }[/math]
[math]\displaystyle{ 18a - 21b \gt x*2 }[/math]
[math]\ce{ {Ba^2} + SO4^{2-} -> BaSO4 v }[/math]