CONCEPT: MASS CONVERSIONS The _______________ is the chemical unit for the amount of a substance. One mole (1 mol) contains 6.022 x 1023 entities, which is known as _________________________________________. •
Entities means ______________________ , ______________________ or ______________________.
We use ______________________ when dealing with a single, individual element.
We use _________________ or _________________when dealing with more than one element or a compound. 6.022 x 1023 atoms of Fe
is equal to
1 mole of Fe
and has a mass of
EXAMPLE: Determine the mass (in grams) found in 7.28 x 1028 nitrogen atoms.
6.022 x 1023 molecules of H2O is equal to
1 mole of H2O and has a mass of
EXAMPLE: Determine how many molecules of carbon dioxide, CO2, are found in 75.0 g CO2.