1. Chemical quantities Chapter 10.1

2. Ways to measure matter Length/width/height Volume Density Surface Area Etc.

3. THE MOLE THE SI UNIT FOR MEASURING THE AMOUNT OF A SUBSTANCE IS A MOLE.

4. Determining the amount of atoms in a mole NaCl has 2 atoms MgO has 2 atoms PF 3 has 4 atoms 1 phosphorus 3 fluorines C 6 H 12 O 6 has 24 atoms in it 6 carbons 12 hydrogens 6 oxygens

5. Representative Particles Atomic oxygen O 16.00 grams in one mole Oxygen Gas O 2 32 grams in one mole (2 atoms x 16)

6. Representative particles Sodium Ion Na+ 22.99 g Sodium Chloride NaCl 22.99 g (Na) + 35.45 g (Cl)

7. Atomic mass How many grams in 1 mole of that element OR How many grams in 6.022 x 10 23 atoms of that element

8. Atomic masses of elements Are based on the mass of the carbon isotope Carbon- 12

9. Sulfur Trioxide 1 x S = 1 x 32.1 = 32.1 amu 3 x O = 3 x 16 = 48 amu 48 amu + 32.1 amu = 80.1 amu The atomic mass of a SO 3 atom is 80 amu.

10. On your own: H 2 O NH 3 PF 3 NaCl C 6 H 12 O 6

11. Molar Mass The molar mass of a compound is the mass of 6.02 x 10 23 molecules of that compound. EX: The molar mass of H 2 O is 18.02 grams.

12. True or False? Molar masses can be calculated directly from atomic masses expressed in grams. TRUE!