Slide 1The Mole Molar mass, percent composition, empirical and molecular formulas Slide 2 How many atoms are in here? What about weight?. Slide 3 Atomic Mass A single atom…

Slide 1 Periodic table Groups – Columns down Alkali Metals Alkaline Earth Metals Halogens Noble gases Periods – Rows across Lanthanides Actinides Groups – Columns down…

MEASURING MASS A mole is a quantity of things, just as… 1 dozen = 12 things 1 gross = 144 things 1 mole = 6.02 x 1023 things “Things” usually measured in moles are…

Chapter 3 Atomic Mass amu = Average Atomic Mass Unit Based on 12C as the standard. 12C = exactly 12 amu The average atomic mass (weight) of an element is equal to the sum…

The Mole Molar mass, percent composition, empirical and molecular formulas How many atoms are in here? What about weight? . Atomic Mass A single atom has a very small mass.…

MEASURING MASS A mole is a quantity of things, just as… 1 dozen = 12 things 1 gross = 144 things 1 mole = 6.02 x 1023 things “Things” usually measured in moles are…

Mass Relationships in Chemical Reactions Chapter 3 Formula Weight (FW) Sum of the atomic weights for the atoms in a chemical formula. e.g., formula weight of calcium chloride,…