For example we consider NaCl compound here Na or sodium is a positive ion and Cl or chlorine is a negative ion. To write the chemical formula of a hydrate write the number of water units per formula unit of compound after its chemical formula. Pascal law Liquid pressure.
For example table salt sodium chloride has a formula unit of NaCl meaning that the sodium and chloride ions are in a 11 ratio.
For example table salt sodium chloride has a formula unit of NaCl meaning that the sodium and chloride ions are in a 11 ratio. In SI units the unit of pressure is Nm-2 also called pascal Pa. A simple example is sodium chloride or common salt a compound of the elements sodium and chlorine. The surface area per formula unit For the graphene example it would be half the in-plane surface area of the cell frac12 mathbfa_1 times mathbfa_2 approx frac12 24412 sin60deg approx 258 because there are two.