How many formula units are in 9.039 moles of sodium chloride

State the formula for density in words and mathematical symbols

The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms

Amap that uses a range of colors and shading to represent the elevation, depth, or landscape of specific features on earth is a/an map.