What is a redox reaction? O A. A reaction in which the number of protons changes between the
reactant and product
B. A reaction in which the oxidation state of one element increases
and another decreases
C. A reaction in which an element in one molecule is traded for an
element in another
O D. A reaction in which an element changes phases when going from
reactant to product

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

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.

What is the popular use of lithium batteries