What is the amount of gas that can be found in a given volume? What quantity is constant?
This question was previously thought to be impossible to answer. However, with the advent of Avogadro’s Law, we now know that: number of molecules in one mole = 6.022 × 1023. One mole is equal to about 6 grams or 12 teaspoons! One mole of any gas at normal temperature and pressure occupies 22.414 liters, or 0.2214 cubic meters (m). The number of molecules in a mole is also the average molecular weight for that substance expressed in grams per mole, so this can be used to give an approximate answer to what quantity is constant? – Number of moles = volume occupied / 0.2214 meters^-0.64 — * total volume/volume displaced by one molecule*Molar Volume=Volume displaced by one molecule divided by Molar Volume; The atomic mass tells us how many atoms are present in each atom type under standard conditions: hydrogen has about 12 amu while oxygen has 16 amu including neutrons