Converting Between Grams and Number of Atoms: How many aluminum atoms are in an aluminum can with a mass of 16.2 g?

GIVEN: 16.2 g Al

FIND: Al atoms

SOLUTION MAP

RELATIONSHIPS USED

26.98 g Al = 1 mol Al (molar mass of aluminum, from periodic table)

6.022 × 1023 = 1 mol (Avogadro’s number)

SOLUTION