How many particles are in a 85.5 g sample of Na2SO4?

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?

Which of the following would have less momentum than a 52 kg cheetah running at 10 m/s?

Which item is most likely part of the safety contract