The Mole & Mole-Particle Conversions 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 (x Billons x 10 thousands?) (way more than ) video clip – TEDEd How big is a mole (4 min) video clip

1 mole of atoms is about 602,200,000,000,000,000,000,000 atoms!

2 Avogadro’s Constant “real” value from wikipedia: 6.022140857(74)×1023 

How do we get the number? The mole is the amount of substance of a system which contains as many things as there are atoms in 12 grams of carbon- 12; its symbol is "mol".

The Pacific Ocean contains approx. 1 mole of mL of water.

Which weighs more? Which has more animals? 6.022 x 1023 atoms of Ne 6.022 x 1023 atoms of C (20.1798 grams) (12.0108 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 6.022  1023 particles. (particles = atoms, molecules, units…) Type 1 Moles Particles 3.0 mol x 6.022 x 1023 atoms = _____ atoms 1 mol Mole = Latin “pile, heap, or mass” Type 2 Particles Moles 1.5 x 1024 molecules x 1 mol of molecules = ___ mol of molecules 6.022 x 1023 molecules

1.28 x 1024 molecules of propane gas Type 1 Moles Particles How many molecules are in 2.12 mol of propane gas (C3H8) ? 2.12 mol x _________________ = 1 mol 6.022 x 1023 molecules ___ molecules 1.28 x 1024 molecules of propane gas

Type 2 Particles Moles 1 mol ___ mol 1.25 x 1023 atoms x _____________ = 6.022 x 1023 atoms 0.208 mol

How many moles is 2.17 x 1024 molecules of Br2 ? Type 2 Particles Moles 2.17 x 1024 molecules x ________________ = 6.022 x 1023 molecules 1 mol ___ mol 3.60 mol

How many atoms are in 1.14 mol SO3? Moles Particles 1.14 mol x 6.022 x 1023 molecules 1 mol x 4 atoms = 1 molecule Type 1 (plus) WS Moles & Molar Mass 2.75 x 1024 atoms