Question detail
A reaction produces 50 g of product A and 150 g of product B. Calculate the atom economy of this reaction if the relative formula mass of product A is 100 g/mol and that of product B is 50 g/mol.
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At a glance
Question
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Topic
Amount of substance
Question
A reaction produces 50 g of product A and 150 g of product B. Calculate the atom economy of this reaction if the relative formula mass of product A is 100 g/mol and that of product B is 50 g/mol.
Answer
The atom economy of the reaction is 25%. This answer is anchored to Balanced equations and reacting quantities. This version is uniquely anchored to Balanced equations and reacting quantities. Retrieval anchor: A-level cue 6d77c890.
Explanation
The atom economy of the reaction is 25%. This answer is anchored to Balanced equations and reacting quantities. is correct because it supports the objective: Calculate atom economy for a reaction.. The reasoning stays within Balanced equations and reacting quantities and avoids drifting into a similar A-Level Chemistry idea. This item is treated as conceptual revision rather than a formal calculation item because the validated answer is an explanation or option choice, not a worked numerical response.
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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