During a lab experiment, students are supposed to add small pieces of magnesium, aluminum, and calcium metal to concentrated hydrochloric acid in a test tube. the laboratory instructions include strong safety warnings to make sure that no sparks, open flames, or high heat sources are present in the room when students perform this experiment. which is the most likely reason for these warnings

1) in saturated limewater, [h+ ]=3.98x10-13 m. a) find [oh]-/ b) what is the ph? / c) is the solution acidic, basic, or neutral? / 2) in butter, [h+ ]=6.0x10-7 m. a) find [oh]-/ b) what is the ph? / c) is the solution acidic, basic, or neutral? / 3) in peaches, [oh]=3.16x10-11 m a) find [h+ ]/ b) what is the ph? / c) is the solution acidic, basic, or neutral? / 4) during the course of the day, human saliva varies between being acidic and basic. if [oh]=3.16x10-8 m, a) find [h+ ]/ b) what is the ph? / c) is the solution acidic, basic, or neutral? /

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?

Is of of 3- ? a. 1--3- b. 1--2- c. 1--3- d. of