In the following reaction mechanism identify the catalyst. • Step #1: H2 + 2Pd – 2PdH
• Step #2: C2H4 + PdH — → C2H5Pd
Step #3: C2H5Pd + PdH — C2H6 +2Pd
Choices:
-C2H4
-Pd
-C2H5Pd
-C₂H6
-PdH

The diagram below shows a cell placed in a solution.a cell is shown placed inside a beaker. it is labeled cell. the solution inside the beaker is labeled 40% salt solution and the solution inside the cell is labeled 20% salt solution.only water is allowed to move in and out of the cell. what will most likely happen to the cell? it will expand as water moves out of it. it will shrink as water moves out of it.it will expand as water moves into it. it will shrink as water moves into it.

Earth's axis of rotation is tilted at an angle of 23.5 degrees. what is one change you would see on earth if its axis was not tilted?

What term is applied to a scientist who studies ancient life, including animal and plant fossils a. anthropologist b. dendroclimatologist c. geophysicist d. paleontologist