A student is given 500 mL of 4 ppm NaCl solution. How many grams of NaCl salt is present in the solution? (Hint: 1 mL H2O = 1 g).

Aroller coaster car is traveling down a track at 22 m/s. the car has a mass of 2000 kg. what is the kinetic energy of the car? a) 22,000 j b) 968,000 j c) 484,000 j d) 44,000 j

In which phase(s) do the molecules take the shape of the container?

Skills of homo sapiens were found an excavation. the skulls were preserved because the bodies were frozen. so, these fossils are (blank) fossils.the image shows the evolution of skulls beginning 2 to 3 million years ago. based on the image, modern human skulls(blank) ape skulls.