Q109 · Practice questionSimple familiar1 mark
QUESTION 109
An organic compound has empirical formula and molar mass . Use C = 12.0 and H = 1.0. What is its molecular formula?
(A)
(B)
(C)
(D)
WORKED SOLUTION
1 markAnswer B
Answer
B
Working
The empirical-formula mass is 14.0 g mol⁻¹. The multiplier is 84.0/14.0 = 6, giving C₆H₁₂.
Marking criteria
- Select B. [1 mark]
Practice question aligned to the current QCAA syllabus; review the worked solution and marking criteria.
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