Fragment ion mass difference
A mass spectrum in a Auckland HL chemistry tutorial has molecular ion \(m/z=72\) and a fragment peak after loss of \(15\). Calculate the fragment \(m/z\). Use the labelled diagram or spectrum before giving the answer. Enter the answer and choose the interpretation that matches the HL chemistry evidence.
Worked practice: chemistry evidence and answer
Use the chemical evidence first, then enter the result and interpretation that match it.
Write a full answer
Now write the response in full, in your own words — this is what the exam asks for. The AI marks it on the same moves you built above (focus, evidence, technique, judgement) and gives feedback on reasoning, evidence, and expression.