(Answered) 1 900times10-3mol of hbr are dissolved in water to make 150

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1) 9.00×10^-3mol of HBr are dissolved in water to make 15.0 L of solution. What is the concentration of hydroxide ions, [OH-], in this solution?

Express your answer with the appropriate units.

2) 6.00 g of NaOH are dissolved in water to make 2.00 L of solution. What is the concentration of hydronium ions, [H3O+], in this solution?

Express your answer with the appropriate units.

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