Question detail
In Relative formula mass, which option best answers variant 4 of this quantitative chemistry objective: Interpret subscripts in a formula when calculating relative formula mass?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations
Question
- A. quantitative relationship: Interpret subscripts in a formula when calculating relative formula mass
- B. wrong formula: uses a different Unit 4.3 relationship from Relative formula mass
- 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 quantitative relationship: Interpret subscripts in a formula when calculating relative formula mass.
Explanation
The correct option is quantitative relationship: Interpret subscripts in a formula when calculating relative formula mass. It is correct because it directly supports the approved learning objective to interpret subscripts in a formula when calculating relative formula mass. This belongs to Relative formula mass within Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations, 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
Misinterpreting Subscripts
Students often confuse subscripts in a chemical formula, leading to incorrect calculations of relative formula mass.
Carefully count the number of atoms represented by the subscripts for each element in the formula before calculating the relative formula mass.
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