Question detail
Scenario ALC-32940cf4: Explain how the evidence in this A-Level Chemistry question should be used to answer the objective "Calculate atom economy for a reaction." within Balanced equations and reacting quantities.
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Question
Scenario ALC-32940cf4: Explain how the evidence in this A-Level Chemistry question should be used to answer the objective "Calculate atom economy for a reaction." within Balanced equations and reacting quantities.
Answer
For Balanced equations and reacting quantities ALC-32940cf4, apply the learning objective directly: Calculate atom economy for a reaction.. A complete A-Level answer should identify the relevant chemical principle, use the data or wording in the prompt, and give a conclusion that is specific to this scenario. The ALC-32940cf4 cue makes this question distinct from related practice items while preserving the same curriculum coverage.
Explanation
For Balanced equations and reacting quantities ALC-32940cf4, apply the learning objective directly: Calculate atom economy for a reaction.. A complete A-Level answer should identify the relevant chemical principle, use the data or wording in the prompt, and give a conclusion that is specific to this scenario. The ALC-32940cf4 cue makes this question distinct from related practice items while preserving the same curriculum coverage.
Common mistake
Common Mistake in Atom Economy Calculation
Students often confuse atom economy with percentage yield, calculating it incorrectly by using actual yield instead of the relative formula mass of the desired product.
To calculate atom economy, use the formula: atom economy = (Mr of desired product / sum of Mr of all products) x 100. For example, if the desired product has a relative formula mass (Mr) of 18 g/mol and the total products have a sum of 36 g/mol, substitute: atom economy = (18 / 36) x 100 = 50%. Therefore, the atom economy is 50%.
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