IB skill practice

Determine empirical and molecular formulae

Paper 1, Paper 2 5 marks Difficulty 5

the correct interpretation

A compound in a school fertilizer 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. 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.