Study with the several resources on Docsity
Earn points by helping other students or get them with a premium plan
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
The concept of a mole, which is a counting unit in chemistry, and Avogadro's Number (6.02 x 1023). It discusses how the number of particles in a mole is always the same, but the mass varies greatly depending on whether the particles are atoms, molecules, or ions. The document also covers how to calculate the number of atoms or grams of a substance.
Typology: Study notes
1 / 6
This page cannot be seen from the preview
Don't miss anything!
1 mole C = 6.02 x 10^23 C atoms 1 mole H 2 O = 6.02 x 10^23 H 2 O molecules 1 mole NaCl = 6.02 x 10^23 NaCl molecules (6.02 x 10^23 Na+^ ions and 6.02 x 10^23 Cl–^ ions)
A Mole of Particles
Contain 6.02 x 10^23 particles
1 mole = 6.02 x 10^23 particles A particle could be an atom, a molecule, OR an ion!
Note that the NUMBER is always the same, but the MASS is very different!
molar mass Avogadro’s number Grams Moles particles
Atoms/Molecules and Grams
Ex: How many atoms of Cu are present in
35.4 g of Cu?
63.5g Cu = 1mol Cu 35.4g Cu = 0.56mol Cu 1mol Cu = 6.02X 10^23 mol Cu atoms 0.56 mol Cu = 3.4 X 10^23 Cu atoms
