- Definite integral of f(x)=sqrt(196-x^2) on the interval -14 to 14?

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A 25.0mL solution containing .60M HCl was titrated with 0.50M NaOH. Calculate the pH before the titration and at equivalence point? What is the partial pressure of N2 in a mixture of N2 and O2 having a total pressure of 1075 torr if the partial pressure of O2 is 720 torr? Help me to solve the following question!
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