1. Calculate the number of atoms in 1.5 moles of aluminum.

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1. Calculate the number of atoms in 1.5 moles of aluminum. WARM-UP 10/28/13 1. Calculate the number of atoms in 1.5 moles of aluminum. 2. Calculate the number of atoms in 1.5 moles of aluminum chloride. 3. Calculate the number of moles that 7.23 x 1025 atoms of zinc make.

Calculate the mass of compounds. 10/28/13 Objective Calculate the mass of compounds. 10/28/13 Agenda 1. Recap of the mole 2. Molar mass

Recap A mole is 6.02 x 1023 of any thing Avogadro’s number

Recap 1) Counting 2) Mass 3) Volume

The mass of a mole of an element. Molar Mass The mass of a mole of an element. Why is it important? We cannot count individual atoms or molecules. We can measure their mass though!

Molar Mass

The mass of any element can be found on the periodic table. Molar Mass Recap: The mass of any element can be found on the periodic table. Building on that concept – How do we find the mass of a mole of a compound?

Molar Mass Just like molecules are atoms added together, the molar mass of a compound can be found by adding the molar masses of the individual elements. 15.999 g/mol 1.0079 g/mol 1.0079 g/mol

The molar mass of dihydrogen monoxide is 18.015 g/mol! H: 2 x 1.0079 = 2.0158 O: 1 x 15.999 = 15.999 2.0159 + 15.999 18.015 g/mol The molar mass of dihydrogen monoxide is 18.015 g/mol!

Sample Problem 10.4. And Practice Problems 7 and 8. Molar Mass Practice Sample Problem 10.4. And Practice Problems 7 and 8.

Finish Measuring Matter worksheet. Lab Report due tomorrow! Tutoring Today! 5th Period - 402 10/28/13 Homework Finish Measuring Matter worksheet. Lab Report due tomorrow!