13)
Which is an example of a solution?
air
oxygen
salt
water

The functioning of an electron transport chain is analogous to a) a slinky toy going down a flight of stairs. b) a canoe going over a waterfall. c) a person climbing a flight of stairs one step at a time. d) a person leaping from the top to the bottom of a flight of stairs in one jump.

What property is a characteristic of a substance that can be observed and does not change the identity of the substance

The energy equivalent of the rest mass of an electron is