Asolution is prepared by dissolving 4.68 g of nacl in enough water to produce 40.0 ml of solution. what is the molarity of nacl for the solution?

The alkali metals (group 1) consist of lithium (3), sodium (11), potassium (19), rubidium (37), cesium (55), and francium (87). they are soft, metallic solids with low densities and low melting points. based on the data shown in figure 1, how many valence electrons do alkali metals share?

Calculate the number of molecules present in 0.750 mol of mgo.

Compare and contrast physical changes with chemical changes.