13. Liquids, Solids & Intermolecular Forces
Body Centered Cubic Unit Cell
13. Liquids, Solids & Intermolecular Forces Body Centered Cubic Unit Cell
2PRACTICE PROBLEM
By using X-ray crystallography, the molecular structure of a protein may be determined if it can be made to crystallize. Despite being solid, protein crystals also contain a significant quantity of water molecules. For instance, a protein extracted from a fruit crystallizes with a unit cell that has 90° angles and edges that are 6.2×103 pm, 6.2×103 pm, and 2.1×103 pm long. The unit cell has eight molecules. What portion of the unit cell is made up of protein if the molecule has a molecular weight of 1.36×104 and a density of 1.32 g/cm3?
By using X-ray crystallography, the molecular structure of a protein may be determined if it can be made to crystallize. Despite being solid, protein crystals also contain a significant quantity of water molecules. For instance, a protein extracted from a fruit crystallizes with a unit cell that has 90° angles and edges that are 6.2×103 pm, 6.2×103 pm, and 2.1×103 pm long. The unit cell has eight molecules. What portion of the unit cell is made up of protein if the molecule has a molecular weight of 1.36×104 and a density of 1.32 g/cm3?