Measure amounts of something with three different methods— Measuring Matter Measure amounts of something with three different methods— by count, by mass, and by volume. Which of these is measured by count? by mass/weight? by volume?

video clip – TEDEd How big is a mole (4 min)

1 mole of atoms is 602,000,000,000,000,000,000,000 atoms!

6.02 x 1023 particles 602,000,000,000,000,000,000,000 particles Avogadro’s Number

Which weighs more? Which has more animals? 6.02 x 1023 atoms of Ne 6.02 x 1023 atoms of C (20 grams) (12 grams) Which weighs more? Which has more atoms? The number of grams in a mole of particles is different by substance.

A mole of any substance contains Avogadro’s number of particles, or 6.02  1023 particles. (particles = atoms, molecules, formula units,…) Type 1 Moles Particles ## mol x 6.02 x 1023 particles = ____ particles 1 mol Mole = Latin “pile, heap, or mass” Type 2 Particles Moles ## x 10## particles x 1 mol = ____ mol 6.02 x 1023 particles

Type 1 Moles Particles 2.12 mol x _________________ = 6.02 x 1023 1 How many molecules are in 2.12 mol of propane gas (C3H8) ? 2.12 mol x _________________ = 6.02 x 1023 molecules ____ molecules 1 mol 1.28 x 1024 molecules in a BOX!!!

Type 2 Particles Moles _____________ = 1 mol ___ mol 1.25 x 1023 atoms x 6.02 x 1023 atoms 0.208 mol in a BOX!!!

How many moles is 2.17 x 1024 molecules of Br2 ? Type 2 Particles Moles ________________ = 1 2.17 x 1024 molecules x mol ___ mol 6.02 x 1023 molecules 3.60 mol WS Moles & Molar Mass #1-3 in a BOX!!!

How many atoms are in 1.14 mol SO3? Moles Particles 1.14 mol x 6.02 x 1023 molecules 4 atoms x = 1 mol 1 molecule Type 1 (plus) 2.75 x 1024 atoms in a BOX!!!