- Calculate the PH of a solution in which [OH-]=2.50*10-4M?

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Find (x2, y2) the point of intersection of tangent lines to y=f(x) at x0, f(x0) and (x1, f(x1))? Kindly can someone solve this? CASE NUMBER? If water molecules are polar then why can’t pure water conduct electricity? A conic section is given by the equation 57x^2+14√3 xy+43y^2-576=0, identity and sketch the conics.
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