Presentation on theme: "Using Moles to Count Atoms"— Presentation transcript:
1 Using Moles to Count Atoms A mole is a unit of amount like a dozen, gross or ream is used to represent a given amount.
2 MoleMole is abbreviated mol and is the number of atoms in exactly 12 grams of carbon-12.Avogadro’s constant is E23 and is the number of particles in 1 mole of any substanceA mole of marbles would cover the continental U.S. to a depth of 70 miles. A mole of periods (.) placed next to each other would equal the radius of our galaxy.
3 Molar Mass The mass in grams of one mole of any substance. The molar mass of any substance is its average atomic mass in grams.The molar mass of Nitrogen is g/mol.There are E23 atoms in g of Nitrogen
4 Conversion FactorsA conversion factor is a fraction or ratio of the molar mass of a substance over 1 mol( g N ) or 1 mol over the molar1molmass of a substance ( mol )g N .
5 Using Conversion Factors To convert from moles to mass multiply the given number of moles by the conversion factor molar mass/1mol.To convert from mass to moles multiply the given amount of mass by the conversion factor 1mol/molar mass.