How can you tell that the substance is not water?

Apure solvent has a vapor pressure the vapor pressure of a solution. a. equal to b. lower than c. higher than

This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.