Which one of the following is not element ?
a) diamond
b) ozone
c) silica
d) graphite

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

Astudent carefully transfers 30 g of water and 30 g of alcohol in a glass tube, forming two layers and filling the tube completely. after sealing the tube, the student mixes the solutions, and notices a bubble that forms in the tube. what is the mass of the contents in the glass tube after mixing?

The minerals found in bones are deposited by living cells called