Molar Mass and Molar Conversions Chapter 3 part III.

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Presentation transcript:

Molar Mass and Molar Conversions Chapter 3 part III

Mole One mole 6.02 X p/mol Aka the chemists’ dozen.

One mole of each element has a different mass.

Why do they have a different mass? Different atoms have different masses.

AMU vs Molar Mass The atomic mass of an atom is equal to the weight of one mole of that element in grams/mole.

Molar Mass Ionic: Gram Formula Unit Covalent: Molecular Mass

Examples: Find the molar mass of different elements. He Na F Answer 4.00 g/mol g/mol g/mol

To calculate the molar Mass of compounds You add up the molar mass of each element found in the compound. Example: CO 2 The subscript is for the O. One Carbon = g/mol Two Oxygens = 2(16.00 g/mol) = g/mol Total is g/mol

Molar Mass of Compounds Find the molar mass of the following compounds. CO 2 : 44 g/mol Ferrous Oxide:104 g/mol Carbonic Acid: 62 g/mol

Now you try! Worksheet