Magnesium hydroxide, Mg(OH), is an antacid that is used to relieve indegestion, sour stomach and heartburn. It can be
prepared by reaction magnesium chloride, MgCl2 and sodium
hydroxide, NaOH with the by-product of sodium chloride, Nacl.
In an experiment, a student allowed 15.1g of MgCl2 to react
with 9.35g of NaOH. Calculate the mass in grams of Mg(OH) that could be obtained at the end of the experiment.

Island arcsisland arcs are long, curved chains of oceanic islands associated with seismic activity and mountain-building processes at certain plate boundaries. they occur where oceanic tectonic plates collide. along one side of these island arcs, there is usually a long, narrow deep-sea trench.at island arcs, the denser plate is subducted and is forced into the partially molten mantle under the less dense plate. the islands are composed of the extrusive igneous rocks basalt and andesite. the basalt originates most likely from the plastic mantle. the andesite originates most likely from the melting of parts of the descending plate and sediments that had accumulated on its surface.which list identifies minerals present in andesite from the greatest percentage by volume to the least percentage by volume? a) biotite, plagioclase feldspar, amphiboleb) biotite, amphibole, plagioclase feldsparc) plagioclase feldspar, biotite, amphiboled) plagioclase feldspar, amphibole, biotite