Determine the volume of bromobenzene and chlorobenzene required to prepare 50 mL of a stock solution containing 1 % (v/v) of bromobenzene and chlorobenzene in dichloromethane. Select one: a. 0.5 mL, 1.0mL b. 0.5ml, 0.5ml O c. 0.5 mL, 0.25mL d. 1.0 mL 1.0 mL e. 1.0 mL, 0.5ml Flammable materials, like alcohol, should never be dispensed or used near Select one: O a. Another student. b. An open door. O c. An open flame. d. A sink O e. An open window For your safety, before leaving the lab you must Select one: a. Wash your hands and any other area of skin that has contacted lab equipment or lab benches. O b. Get the instructor's initial on the lab report. O c. See that all equipment in the community drawer is complete and well organized. O d. Put hot object away e. Mix all left over chemical into one container. Indicate the volume required to prepare 100mL of a 1M sulfuric acid stock solution. Select one: O a. 7.5 mL O b. 3.0 mL O c. 5.0 mL O d. 6.5 mL O e. 5.43mL