Which of the following is not a laboratory safety rule? O a. You should tie back your long hair O b. Wash your hands with water before leaving the lab O . You should never mix acids with bases Od. You should never add water to acid Question 6 Suppose you touched your filter paper with wet fingers immediately before weighing it. Not yet After you collected your precipitate on the filter paper, you dried the solid and filter paper answered before obtaining the final weight. The calculated mass for the solid precipitate would Marked out of 2.00 P Flag question O a. decrease O b. not affected O c. increase