In horsetails, the stalk, or stem, is hollow inside, with the mineral
Science

In an oxidation-reduction reaction, oxidation is what happens when a reactant

Silver reacts with oxygen to produce silver oxide. (write balanced chemical equation and identify type of chemical reaction.)

Awhite powder is added to a solution. the images show observations made before the powder is added, just after the powder has been added, and a little while later. (the liquid in the small beaker is phenol red solution.) what evidence shows that a chemical change has taken place?