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Chem Catalyst

Chem Catalyst. What is the atomic mass of: Cl ? Fe? KCl ? H 2 O?. Today’s Agenda:. Catalyst Notes- Molar mass HW: p. 296 # 7, 8; p. 303 #26,27. Molar Mass. Periodic table gives mass in amu - same as the mass in grams of 1 mole of that substance [g/ mol ]

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Chem Catalyst

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  1. Chem Catalyst • What is the atomic mass of: • Cl? • Fe? • KCl? • H2O?

  2. Today’s Agenda: • Catalyst • Notes- Molar mass • HW: p. 296 # 7, 8; p. 303 #26,27

  3. Molar Mass • Periodic table gives mass in amu- same as the mass in grams of 1 mole of that substance [g/mol] • For compounds: add mass of all elements to find total mass in g/mol.

  4. Finding Molar Mass • Find the molar mass of H2O2 • Find the molar mass of Al2O3 • Find the molar mass of Fe2O3

  5. Conversion: Moles to Mass • Multiply by (molar mass/ 1 mol) • Ex: What is the mass of 9.45 mol of Al2O3?

  6. Conversion: Mass to Moles • Multiply by (1 mol/ molar mass) • Ex: How many moles of iron (III) oxide are contained in 92.2g of Fe2O3?

  7. Summary

  8. Practice: • Calculate the mass, in grams, of 2.50 mol Fe(OH)2 • Find the mass of 3.00 mol of NaCl • Find the number of moles in 0.370 g of Boron. • Calculate the number of moles in 75.0 g of dinitrogen trioxide.

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