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Moles and Molecules. Formula Mass Sum of the average atomic masses of all the atoms represented in a formula Measured in amu What is the formula mass.

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Presentation on theme: "Moles and Molecules. Formula Mass Sum of the average atomic masses of all the atoms represented in a formula Measured in amu What is the formula mass."— Presentation transcript:

1 Moles and Molecules

2 Formula Mass Sum of the average atomic masses of all the atoms represented in a formula Measured in amu What is the formula mass of KClO 3 ?

3 Molar Mass How many grams of a substance there are per mole of that substance Numerically equal to the formula mass Units are g/mole What is the molar mass of water?

4 Mole Problems How many grams are in 2.8 mole of MgCl 2 ? How many grams in 3.0 mole of NaCl? How many grams in.10 mole of carbon dioxide?

5 Mole Problems How many moles in 125g of BeS? How many moles in 450 g of CaCO 3 ? How many moles in 33.4 g of O 2 ?

6 Mole Problems How many molecules in.58 mole of CaCl 2 ? How many molecules in 3.0 mole of water?

7 Mole Problems How many moles is 1.35x10 24 molecules of water? How many moles is 5.6x 10 23 molecules of HCl?

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