Which of the following is not a true statement? o a metal ion can form a complex with water, thereby increasing water's acidity. o a metal ion can make a reaction center more susceptible to receiving electrons o a metal ion can make a leaving group a weaker base. o metal-bound hydroxide is a poorer nucleophile than water. 0 the pka of a metal-bound water depends on the metal ion.

How does a hydroelectric power plant converts energy into energy.

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.