Identify the atom that increases in oxidation number in the following redox reaction. 2mno2 +2k2co3 + o2? 2kmno4 +2co2
a. o
b. mn
c. kd. c

Water molecules have a strong attraction to each other because of hydrogen bonding, allowing water to move against gravity up a plant's stem through capillary action. true false

Asolution contains 225 g of sodium chloride, nacl, dissolved in enough water to make a 0.25 l of solution. what is the molarity of the solution?

What are scientists who study fossils called? ( a ) astronomers. ( b ) biologists. ( c ) geologists. ( d ) paleontologists.