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Moles and Limiting Reagents

Moles and Limiting Reagents. CHEM 140. Problem 1. How many moles of Ca in 77.4 g of Ca?. Problem 2. What is the mass of one atom of Hg?. Additional problems. Calculate the molar mass of a compound if 0.372 mol of it weighs 152 g

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Moles and Limiting Reagents

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  1. Moles and Limiting Reagents CHEM 140

  2. Problem 1 • How many moles of Ca in 77.4 g of Ca?

  3. Problem 2 • What is the mass of one atom of Hg?

  4. Additional problems • Calculate the molar mass of a compound if 0.372 mol of it weighs 152 g • How many molecules are there in 1.0 × 10-12 g of C19H38O

  5. ×2 /1 Limiting Reagent 60.06 17.03 44.01 2NH3 + CO2 (NH2)2CO + H2O 37.42 25.95 mol –25.95 –51.90 Have 637.2 g of NH3 and 1142 g of CO2

  6. ×1 /2 2NH3 + CO2 (NH2)2CO + H2O 37.42 25.95 mol Have 637.2 g of NH3 and 1142 g of CO2 Limiting Reagent 60.06 17.03 44.01 –37.42 –18.71

  7. 2NH3 + CO2 (NH2)2CO + H2O 37.42 25.95 mol Have 637.2 g of NH3 and 1142 g of CO2 Limiting Reagent Limiting 60.06 17.03 44.01 –37.42 –18.71

  8. ×1 /2 2NH3 + CO2 (NH2)2CO + H2O 37.42 25.95 mol Have 637.2 g of NH3 and 1142 g of CO2 Limiting Reagent 60.06 17.03 44.01 +18.71 –37.42 –18.71 1124 g of (NH2)2CO produced

  9. 2NH3 + CO2 (NH2)2CO + H2O 37.42 25.95 mol +18.71 –37.42 –18.71 7.24 Have 637.2 g of NH3 and 1142 g of CO2 1124 g of (NH2)2CO produced Limiting Reagent 60.06 17.03 44.01 319 g of CO2 left

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