What are minerals called that carry a positive or negative charge and must be carefully balanced for the body to function in a healthy state?

Which compound contains both ionic and covalent bonds? a) hbr b)cbr4 c)nabr d) naoh

Astudent carefully transfers 30 g of water and 30 g of alcohol in a glass tube, forming two layers and filling the tube completely. after sealing the tube, the student mixes the solutions, and notices a bubble that forms in the tube. what is the mass of the contents in the glass tube after mixing?

How do you lengthen a pattern piece? (family and consumer science, sewing)