Which of the following is one part of a chemical formula for a molecule?
a number showing the atomic masses of each element
a lewis dot diagram for the molecule
a number that shows the total number of chemical bonds
numbers that show how many atoms of each element are in the molecule

Ascientist notices that an oil slick floating on water when viewed from above has many different colors reflecting off the surface, making it look rainbow-like (an effect known as iridescence). she aims a spectrometer at a particular spot and measures the wavelength to be 750 nm (in air). the index of refraction of water is 1.3