Expand: (x-3)^2

(A) x2-3x+9(B) x2-9(C) x2+3x+9(D) x2+9(E) None of these


Measuring Density

The density of platinum is 21.45 g/cm3 at 20˚C. Calculate the mass of 75.00 cm3 of platinum at this temperature.


Calculate the [OH-] given [H3O+]=6.5×10−4M.

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