Since mercury is a toxic metal why is it used in liquid barometer instead of water

This chart represents the melting point of several substance. what besy explains the high melting point of the salt?

Select the correct answer. why are scientific models important in the study of science? a. they always involve critical mathematical calculations. b. they scientists understand complex ideas and objects that aren’t easy to handle. c. they enable scientists to popularize their work in society. d. they are required when conducting any peer review process. e. they are necessary for turning a hypothesis into a law.

Can you guys answer these questions i need it before 1: 00pm