Ionic compounds are made of ions, and yet the overall charge of an ionic compound is neutral. why?

Light waves can move through , but they travel fastest when they move through a(n) .

Are oil and water a mixture or solution

To prevent the presence of air, noble gases are placed over highly reactive chemicals to act as inert "blanketing" gases. a chemical engineer places a mixture of noble gases consisting of 4.37 g of he, 13.36 g of ne, and 36.65 g of kr in a piston-cylinder assembly at stp. calculate the partial pressure in torr of kr.