What are three scales used to measure temperature? what ae the units of each scale

There are main groups in the modern periodic table of elements

Between 2014 and 2016, more than 25,000 children in flint, michigan, drank water that was contaminated with lead from lead pipes. during this time, the city claimed the water was safe to drink. which of these actions could the city have taken to ensure that the drinking water was free from lead?

What is the mass of 0.46 mol of mgcl2