5.5.2 Atom Economy

• What is atom economy a measure of in a chemical reaction?

  Efficiency of atom conversion
• The formula for calculating atom economy involves the molar mass of reactants only.

  False
• Why does a higher atom economy align with green chemistry principles?

  Reduces waste and resources
• Atom economy accounts for waste generated in a chemical reaction.
• The significance of atom economy is environmental sustainability.
• What does a higher atom economy value indicate in terms of waste production?

  Less waste is produced
• Match the metric with its calculation:

  Atom Economy ↔️ $\frac{\text{Molar mass of desired product}}{\text{Total molar mass of all reactants}} \times 100\%$

  Percentage Yield ↔️ $\frac{\text{Actual yield}}{\text{Theoretical yield}} \times 100\%$
• A higher atom economy indicates less waste is produced.
• What does percentage yield measure in a chemical reaction?

  Product obtained compared to theoretical
• Percentage yield considers the waste generated during a chemical reaction.

  False
• Match the metric with its focus and calculation:

  Atom Economy ↔️ Efficiency of atom usage and $\frac{\text{Molar mass of desired product}}{\text{Total molar mass of all reactants}} \times 100\%$

  Percentage Yield ↔️ Amount of product obtained and $\frac{\text{Actual yield}}{\text{Theoretical yield}} \times 100\%$
• A higher atom economy aligns with green chemistry principles.
• Percentage yield accounts for the amount of waste produced during a reaction.

  False
• What is the significance of percentage yield in a chemical reaction?

  Product quantity
• A higher atom economy indicates less waste is produced.
• Percentage yield measures how efficiently atoms are used in a reaction.

  False
• What is atom economy a measure of?

  Efficiency of atom conversion
• The formula for calculating atom economy is Molar
• A higher atom economy indicates less waste is produced.
• What does percentage yield measure?

  Product obtained vs theoretical maximum
• The formula for calculating percentage yield is Actual
• Percentage yield accounts for waste generated in a reaction.

  False
• What is the focus of atom economy?

  Efficiency of atom usage
• The molar mass of a substance is measured in grams per mole
• To identify molar masses, you must first write the chemical formula of the substance.
• Where can you find the atomic mass of each element?

  Periodic table
• The molar mass of water ($H_{2}O$) is 18 g/mol.
• Why is a higher atom economy desirable in chemistry?

  Less waste is produced
• Percentage yield considers waste generated, while atom economy does not.

  False
• What principle does atom economy align with?

  Green chemistry
• Water boils at 100 degrees Celsius at standard atmospheric pressure
• Atom economy focuses on the efficiency of atom usage.
• What is the first step in identifying molar masses?

  Write the chemical formula
• The atom economy for the reaction of methane and oxygen to produce carbon dioxide and water is 55%.
• What is the formula for atom economy?

  $\text{Atom Economy} =$$\frac{\text{Molar mass of desired product}}{\text{Total molar mass of all reactants}} \times 100\%$
• The reaction $CH_{4} +$$2O_{2} \rightarrow CO_{2} +$$2H_{2}O$ produces carbon dioxide as the desired product
• What is the molar mass of CH_{4}</latex>?

  16 g / mol
• The atom economy of the reaction $CH_{4} +$$2O_{2} \rightarrow CO_{2} +$$2H_{2}O$ is 55%.
• The reaction $C_{2}H_{4} +$$H_{2} \rightarrow C_{2}H_{6}$ produces ethane as the desired product
• What is the molar mass of $C_{2}H_{4}$?


  28 g / mol