In electroplating, how should the object that will be plated be connected in the electrolytic cell?
it should be the cathode, where metal atoms are reduced to metal ions.
it should be the cathode, where metal ions are reduced to metal atoms.
it should be the anode, where metal atoms are oxidized to metal ions.
it should be the anode, where metal ions are oxidized to metal atoms.

The volume of helium in a blimp is 6.28 x 10^9 millimeters. the density of helium in the blimp is .1786 kilogram/meter^3. find the mass of the helium in the blimp.

Explain what happens at the saturation point when adding salt to water at room temperature.

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.