Question detail

Case 85 exam-language. Which response would earn credit for the calculation method? Focus on that balanced chemical equation the total relative in Relative formula mass, not on a neighbouring Unit 4.3 idea.

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

Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations

Question

A. Case 85 exam-language: Show formula, substitution, calculation, final answer, and unit for that balanced chemical equation the total relative
B. Case 85 exam-language: Write only the final answer with no working (Relative formula mass)
C. Case 85 exam-language: Describe the practical method instead of the calculation relationship (that balanced chemical equation the total relative)
D. Case 85 exam-language: Quote the topic title without applying it to the data (Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations)

Answer

The correct option is Case 85 exam-language: Show formula, substitution, calculation, final answer, and unit for that balanced chemical equation the total relative.

Explanation

The correct option is Case 85 exam-language: Show formula, substitution, calculation, final answer, and unit for that balanced chemical equation the total relative. It supports the approved learning objective by keeping the method tied to that balanced chemical equation the total relative in Relative formula mass. The other options are incorrect because they either use the wrong quantitative relationship, lose the required unit, confuse coefficients with subscripts, or report an answer without a complete worked method.

Common mistake

Misunderstanding Mass Conservation

Students often think that the mass of reactants and products can differ if gases are involved, not realizing that the total mass remains constant.

Emphasize that the law of conservation of mass states that no atoms are lost or gained, so the total mass of reactants must equal the total mass of products, regardless of the state of matter. Keep the correction anchored to Relative formula mass; check formula, substitution, calculation, final answer, and unit where relevant.

Related flashcards

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For Relative formula mass, which unit conversion answer best supports this Unit 4.3 objective: Explain that in a balanced chemical equation the total relative formula mass of reactants in the stated quantities equals that of the products?