Question detail
Calculate the relative formula mass (Mr) of carbon dioxide (CO2).
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations
Question
Calculate the relative formula mass (Mr) of carbon dioxide (CO2).
Answer
The answer is 2.
Explanation
This uses Relative Formula Mass because the objective is about calculate the relative formula mass of a compound from its chemical formula and relative atomic masses. The reasoning belongs to Relative formula mass within Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations, so it should not be confused with nearby quantitative ideas such as mass, moles, concentration, yield, atom economy, or gas volume unless those are named in the objective. Use the focus term relative formula mass to keep the answer aligned with AQA GCSE Chemistry 8462 Unit 4.3.
Common mistake
Misunderstanding Relative Formula Mass Calculation
Students often forget to multiply the relative atomic mass by the number of atoms indicated by the subscripts in the chemical formula.
Always ensure to multiply the relative atomic mass of each element by its subscript in the formula before summing them to find the relative formula mass.
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