For the reaction between zinc and copper(II) sulfate, describe the inital appearance of reactants and the appearance after 30 minutes and identify the evidence of chemical reaction. Then balance the chemical equation and identify the type of reaction.

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?

How many neutrons does a atom of cobalt have?

What term is missing from the central region that describes hypotheses, theories, and laws? popular predictable mathematical falsifiable