Write one letter in each blank to match each set of product requirements.
1. the material
_ should be used to make the pipes in a home because it is strong and
relatively nonreactive.
2. the tip of a match contains a compound called red phosphorus, which bums easily in air. during the
production of matches, the red phosphorus needs to be stored under
because it is a
nonreactive gas that keeps the red phosphorus from burning.
a. argon
b. copper
c. magnesium

18. determine whether each stateme blank space given. ach statement is true (t) or false (f). place your answer in the 8. when a cell is put into an isotonic solution, individual wat put into an isotonic solution, individual water molecules cannot move back and forth across the cell membrane. d. when a cell is put into a hypertonic solution, there is a net movement of water molecules across the cell membrane into the cell. c. when a cell is put into a hypotonic solution, there is a net movement of water molecules across the cell membrane out of the cell. d. the movement of any solvent across a semi-permeable membrane is called osmosis. e. carrier proteins have the ability to change shape and physically move molecules across the cell membrane. f. in facilitated diffusion, the concentration of the molecules to be moved across the cell membrane is higher inside the cell.