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Stoichiometry: Mole-Mass equations

Stoichiometry: Mole-Mass equations. Ex 5) How much oxygen will be consumed when 3.92 moles of methane (CH 4 ) are consumed in a combustion reaction? (Don’t forget to balance!). CH 4 + O 2  CO 2 + H 2 O. 2 2. 3.92 mol CH 4. 2 mol O 2.

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Stoichiometry: Mole-Mass equations

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  1. Stoichiometry: Mole-Mass equations Ex 5) How much oxygen will be consumed when 3.92 moles of methane (CH4) are consumed in a combustion reaction? (Don’t forget to balance!) CH4 + O2 CO2 + H2O 2 2 3.92 mol CH4 2 mol O2 32.0 g O2 = 250 g O2 1 mol CH4 1 mol O2

  2. Stoichiometry: Mole-Mass equations Ex 6) How much carbon dioxide will be produced when 3.92 moles of oxygen are consumed in a combustion reaction? CH4 + O2 CO2 + H2O 2 2 3.92 mol O2 1 mol CO2 44.0 g CO2 = 86.2 g CO2 2 mol O2 1 mol CO2

  3. Stoichiometry: Mass-Mole equations Ex7) How many moles copper II chloride can be produced by reacting 10.25 grams of sodium chloride with excess copper II nitrate? NaCl + Cu(NO3)2  CuCl2 + NaNO3 2 2 1 mol NaCl 10.25g NaCl 1 mol CuCl2 = 0.0876 mol CuCl2 58.5 g NaCl 2 mol NaCl

  4. Stoichiometry: Mass-Mole equations Ex 8) How many moles copper II nitrate will react with 7.98 grams of sodium chloride? NaCl + Cu(NO3)2  CuCl2 + NaNO3 2 2 1 mol NaCl 7.98 g NaCl 1 mol Cu(NO3)2 = 0.0682 mol CuCl2 58.5 g NaCl 2 mol NaCl

  5. Stoichiometry: Mass-Mass equations Ex 9) How many grams copper II chloride can be produced by reacting 10.25 grams of sodium chloride with excess copper II nitrate? (Double Displacement Reaction) 2NaCl + Cu(NO3)2  CuCl2 + 2NaNO3 1 mol NaCl 58.5 g NaCl 1 mol CuCl2 2 mol NaCl 134.5 g CuCl2 1 mol CuCl2 10.25g NaCl 11.8 g CuCl2 =

  6. Stoichiometry: Mass-Mass equations Ex 10) How many grams oxygen will be consumed when 12.5 grams of methane (CH4) are consumed in a combustion reaction? (Combustion) CH4 + 2O2 CO2 + 2H2O 12.5g CH4 1 mol CH4 16.0g CH4 2 mol O2 1 mol CH4 32.0 g O2 1 mol O2 = 49.9 g O2

  7. Just so you know… • WA ch 12 + 11.4, 11.5 is ENORMOUS (200 points) • You can now do #19-30 • Answers for #7-9 are given on the website mmecall.weebly.com You can also find… Notes homework hints

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