Question detail

In Percentage yield, which option best answers variant 3 of this quantitative chemistry objective: (chemistry only) (HT only) Calculate theoretical mass of product from a given mass of reactant and a balanced equation?

Try the question, check the answer, then read the explanation to understand the curriculum point.

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At a glance

MCQ

Type

practice

Style

Topic

Yield and atom economy of chemical reactions (chemistry only)

Question

A. formula and unit: (chemistry only) (HT only) Calculate theoretical mass of product from a given mass of reactant and a balanced equation
B. wrong formula: uses a different Unit 4.3 relationship from Percentage yield
C. wrong unit: gives a value without checking the required unit
D. wrong reasoning: confuses coefficients, subscripts, mass, moles, or concentration

Answer

The correct option is formula and unit: (chemistry only) (HT only) Calculate theoretical mass of product from a given mass of reactant and a balanced equation.

Explanation

The correct option is formula and unit: (chemistry only) (HT only) Calculate theoretical mass of product from a given mass of reactant and a balanced equation. It is correct because it directly supports the approved learning objective to (chemistry only) (HT only) Calculate theoretical mass of product from a given mass of reactant and a balanced equation. This belongs to Percentage yield within Yield and atom economy of chemical reactions (chemistry only), so the answer must use the named Unit 4.3 relationship and avoid mixing it with nearby ideas such as mass, moles, concentration, yield, atom economy, gas volume, coefficients, or subscripts.

Common mistake

Confusing Theoretical and Actual Yield

Students often confuse theoretical yield with actual yield when calculating percentage yield.

Always remember that theoretical yield is the maximum amount of product expected from a reaction, while actual yield is what is actually obtained. Use the correct values in the percentage yield formula. Keep the correction anchored to Percentage yield; check formula, substitution, calculation, final answer, and unit where relevant.

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For Percentage yield, which option best supports this Unit 4.3 objective: (chemistry only) (HT only) Calculate theoretical mass of product from a given mass of reactant and a balanced equation?