1 point A polar bear starts at the North Pole. It travels 1.0 km South, then 1.0 km
East, and then 1.0 km North to return to its starting point. This trip takes 45
minutes. What was the bear's average SPEED?
0.00 km/hr
0.067 km/hr
4.0 km/hr
5.3 km/hr

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).