Which statements describe what happen in a redox reaction? a. one atom gains electrons and one loses electrons
b. the cations on two substances trade places
c. electrons move from one substance to another
d. there are two oxidation reactions

Which of the following methods uses the decay of atomic particles in an object to find its exact age? a. fossil dating b. geologic dating c. radioactive dating d. relative dating

How many moles of carbon dioxide will form if 2.5 moles of c3h8 is burned

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.