commercial scuba divers use tanks filled with a mixture of gases known as trimix on very long, deep dives. Trimix is composed of 70 percent nitrogen, 10 percent oxygen, and 20 percent helium. The total pressure of trimix inside a certain tank at the beginning of a dive is 118.4atm.

answer; i believe the correct answer is (solid gold);

a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.

the answer is c. nacl