The term electrical work best fits which of the following descriptions? Select the correct answer below: A) Electrical work is the difference in electrical potential that arises when dissimilar metals are connected.
B) Electrical work is the charge of 1 mol of electrons.
C) Electrical work is the rate of flow of electrical charge.
D) Electrical work is the negative of the product of total charge and cell potential

Which statement describes evidence of a chemical reaction? a) ice melting eliminate b) water boiling c) lighting a match d) grape juice freezing

Which of the following signs of a chemical reaction are observed in the reaction of potassium with water? precipitate formed temperature change smell produced gas produced color change

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.