Molecules are made up by chemically bonding two or more atoms of the same element or different elements, they don’t have charge, and the atoms are bonded by covalent bonds. <span>Lattices have a three- dimensional ordered arrangement of basic units (that can be an atom, molecule or an ion). Lattices are crystalline structures with these repeated basic units. When ions joined with ionic bonds, they form ionic crystals. The formula unit tells us that aluminium hydroxide has a crystal structure made from molecules. </span>
They are isotopes because isotopes have the same number of protons (atomic number) but can have different numbers of neutrons + protons (atomic mass).
i think..
potassium hydroxide..
Answer: ![[OH^-] =10^{-10.75}=1.778\times 10^{-11}M](https://tex.z-dn.net/?f=%5BOH%5E-%5D%20%3D10%5E%7B-10.75%7D%3D1.778%5Ctimes%2010%5E%7B-11%7DM)
Explanation: pOH is defined as negative logarithm of hydroxide ions. More is the number of ![[OH^-]](https://tex.z-dn.net/?f=%5BOH%5E-%5D)
ions , lesser is the pOH and vice versa.
pH + pOH = 14
![10.75=-log[OH^-]](https://tex.z-dn.net/?f=10.75%3D-log%5BOH%5E-%5D)
![[OH^-] =10^{(-10.75)}=1.778\times 10^{-11}M](https://tex.z-dn.net/?f=%5BOH%5E-%5D%20%3D10%5E%7B%28-10.75%29%7D%3D1.778%5Ctimes%2010%5E%7B-11%7DM)
