Arock is placed into water and the volume of water increases 15 ml. what is the density of the rock if it had a mass of 24.3 grams

Asingle atom of an element has 21 neutrons, 20 electrons, and 20 protons. which element is it? ok o z

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?

Give the set of reactants (including an alkyl halide and a nucleophile) that could be used to synthesize the following ether: draw the molecules on the canvas by choosing buttons from the tools (for bonds and charges), atoms, and templates toolbars, including charges where needed. ch3ch2och2ch2chch3 | ch3