Answer: I think the alcohol molecules slip between the water molecules and take up that space, so you have less that you started with.
Explanation:
It's the rows. They are periods. (1,2,3,4,5,6,7 - the ones without the letters).
Answer: Edge length of the unit cell = 628pm
Explanation: For a body centred cubic structured system, the relationship between the edge length of the unit cell and radius of the atoms in the structure is
Edge length of Unit cell (a) = (4R)/(√3)
R = 272pm = (272 × (10^-12))m = (2.72 × (10^-10))m
a = (4 × (2.72 × (10^-10)))/(√3)
a = (6.28157 × (10^-10))m = 628pm
