When an iron cylinder with a mass of 200 g is dropped into a graduated cylinder, the volume is measured to be 25.4 mL. What is the density of iron? HELP ASAP

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 method(s) do plants use to obtain nitrogen? select all that apply. absorb it from the atmosphere use bacteria to convert nitrogen to usable form obtain usable nitrogen compounds from the soil absorb nitrogen from water taken in at the roots

Find the mass, in grams, of 5.00*10^23 molecules of f2