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Factor Label Review & Mole Calculations

Factor Label Review & Mole Calculations. Factor Label Method. write down given value write unit of given in denominator write unit to find in numerator insert numerical values solve. Factor Label Example. How many hours are in 3.75 years? ( Known: 1 year = 365.25 days 1 day = 24 hours ).

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Factor Label Review & Mole Calculations

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  1. Factor Label Review &Mole Calculations

  2. Factor Label Method write down given value write unit of given in denominator write unit to find in numerator insert numerical values solve

  3. Factor Label Example • How many hours are in 3.75 years? ( Known: 1 year = 365.25 days 1 day = 24 hours ) Step 1: set up problem by inserting units Step 2: insert numerical values and calculate

  4. Molar Relationships Mole as a number of particles Molar Mass Molar Volume of a Gas

  5. Mole to Particle Conversions • 1 mole = 6.02x1023 molecules or atoms Problem1 : How many molecules are in 1.75 moles of N2?

  6. Mole to Particle Conversions #2 • 1 mole = 6.02x1023 molecules or atoms Problem2 : How many moles are in 2.59x1022 molecules of N2?

  7. Molar Mass Molar Mass = mass of 1 mole of a substance • Elements: atomic mass in units of grams Na = 23.0 grams Cl = 35.5 grams • Compounds: sum of individual masses in grams NaCl = 58.5 grams CaCl2 = 111.1 grams

  8. Mole to Mass Conversions • 1 mole = X grams of element/substance • 1 mole NaCl = 58.5 g Problem 1: How many grams are in 2.38 moles of NaCl?

  9. Mole to Mass Conversions #2 Problem 2: How many moles if 97.2 g of NaCl? 1

  10. 2 Step Mole Problems • Mass → Moles → Molecules • Molecules → Moles → Mass • Gas volumes too!!! MOLE ISLAND !!!

  11. Mole Island 6.02 x 1023 Molar Mass GasVolume Reef 22.4 Liters

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