the correct interpretation
A compound in a mineral sample analysis has empirical formula mass \(16\,\text{g mol}^{-1}\) and molar mass \(80\,\text{g mol}^{-1}\). Calculate the multiplier from empirical formula to molecular formula. Use the diagram labels first, then answer carefully. Enter the answer and choose the interpretation that matches the chemistry.
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.