Answers: 3
![pOH=-\log[OH^-]](/tpl/images/0000/2175/fe336.png)
![3.90=-\log[OH^-]](/tpl/images/0000/2175/ef75b.png)
![[OH^-]=1.26\times 10^{-4}M](/tpl/images/0000/2175/c5fb9.png)
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What is the [oh-] in a solution with a poh of 3.90...
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