2. imagine three 2l metal bottles. one of the containers is completely full of oxygen
gas, one is half-full, and one is completely empty. all three containers look the same.
design an experiment to determine which container is full of gas, which is half-full,
and which is empty.

Bridget is in science class. her teacher gives her two unknown substances and asks her to determine their relative ph. she places a piece of red litmus paper into both substances. the litmus paper turns purple when she places it into substance i. the litmus paper turns blue when she places it into substance ii. a. substance i is a neutral substance and substance ii is an acid. b. substance i is a neutral substance and substance ii is a base. c. substance i is an acid and substance ii is a base. d. substance i is a base and substance ii is a neutral substance.