What r the safety measure to take in chemistry lab while doing an experiment ​

Which produce would best increase the amount of heat energy that is actually gained by calorimeter b

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.

27 drag each label to the correct location on the image. a particular exosolar system has five planets in total: a, b, c, d, and e. the table lists the orbital periods of these planets in days. planet orbital period (days) a 600 b 80 c 1,000 d 500 e 100 move each planet to its orbit in the system.