Afreshly brewed cup of coffee has temperature 95°c in a 20°c room. when its temperature is 67°c, it is cooling at a rate of 1°c per minute. when does this occur? approximate to three decimal places.

Ahypothetical metal has an orthorhombic unit cell for which the a, b, and c lattice parameters are 0.413 nm, 0.665 nm, and 0.876 nm, respectively. (a) if there are 8 atoms per unit cell and the atomic packing factor is 0.536, determine the atomic radius (in nm). (b) if the density is 3.99 g/cm3, calculate the metal's atomic weight (in g/mol).