The amount of stearic acid (284 g mol 1) in the monolayer [ x 10-8 mol, 3 s.f.)

In a simple cubic lattice (based on a single element) with atoms at each point in the lattice and with a lattice constant a, what is the density of atoms (number per unit area) on a surface (100) .

(b) Using the Crystallographer's formula to determine the density (in g/cm³) of Po: ρ = Σ Ζ * Μ Vell* N You must know that a primitive cubic cell has Z = 1 Since Po is a metal, the value of "i" = 1, since it's the only entity! MM of Po= 208.998 g/mol Vcell (in cm³) = a³ Vcell (3.36 x 10-8 cm)³ = 3.793 x 10-23 cm³ N = 6.022 x 1023 atoms/mol Thus: p = (1 atom/cell) (208.998 g/mol) = 9.16 g/cm³ (3.793 x 10-23 cm³) (6.022 x 1023)

If you place 30.0 L of hexane (C6H14) in a sealed room that is 3.75 m long, 2 m wide, and 3 m high, will all the hexane evaporate? If some liquid remains, how much will there be? The vapor pressure of hexane is 152 torr at 25 °C, and the density of the liquid at this temperature is 0.655 g/mL. Treat the room dimensions as exact numbers.