A metal has a body-centered cubic lattice with a unit cell edge length of 2.866 Å (1 Å = 10-10m). The density of the metal is 7.87 g/cm2. What is the mass of an atom of this metal in grams? (1 m = 1012 pm). %3D

A solution is made using 250.0 mL of ethanol (density 0.7892 g/mL) and 673.1 mL of water (density 1.000 g/mL). What is the mass percent of the ethanol?

An intrepid daredevil has a plan to fly to Mars and go skydiving in the Martian atmosphere! They want you to determine if this skydive will be safe by determining the terminal velocity that they will reach on their dive. Our daredevil really wants to go on this trip so they have done some measurements for you! The mass of the person is 75 kg, their projected area (chest-first) is 0.70 m² and their drag coefficient in this orientation is 1.05. The air density of Mars is 0.015 kg/m³ and the gravity on Mars is 38% of Earth's gravity. What is the terminal velocity (in miles per hour) of the person in their skydive descent to Mars' surface? (4 pts)