Stoichiometry - 1 Stoichiometry The Mole (mol) The SI unit...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Stoichiometry The Mole (mol) – The SI unit for the amount of a substance. The amount of a substance that contains the same number of entities as there are atoms in exactly 12 g of carbon-12. Avogadro’s Number = 6.022 x 10 23 entities. One mole of a substance represents a fixed number of chemical entities (atoms, molecules, formula units) and has fixed mass. The Atomic Mass (1 atom) of an element is expressed in amu (atomic mass units) One mole of atoms of an element is expressed in g (grams). 1 S atom has mass 32.07 amu and 1 mol of S atoms has mass 32.07 g. 1 formula unit of NaCl has mass 58.44 amu and 1 mol of NaCl has mass 58.44 g Molar Mass = mass / mole of entities, measured in g / mol Calculate the molar mass of glucose, C 6 H 12 O 6 Converting mass – mole relationships To convert between amount (mol) and mass (g), use the molar mass in g / mol. To convert between amount (mol) and number of entities, use Avogadro’s number. For elements that occur as molecules, use the
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 3

Stoichiometry - 1 Stoichiometry The Mole (mol) The SI unit...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online