A piece of metal block is 12.3 in by 4.5 in. The mass of the block is 1.23 Lb. If the density is 2.3 g/ml what is the tickness of the block in mm?

16. in a reaction that has reached equilibrium, a. the forward and reverse reactions are occurring at the same rate. b. the reactants and products are in equal concentrations. c. the forward reaction has gone further than the reverse reaction. d. there are equal numbers of atoms on both sides of the equation. e. a, b, and d are correct.

How can carbon move from "land" to bodies of water? describe the way human impact has lead to increased levels of co2 in the atmosphere.

What is formed when amino acids form long chains or polymerize