IB skill practice

Use amount of substance and molar mass

Paper 1, Paper 2 5 marks Difficulty 3

Amount from mass and molar mass

A sample in a school fertilizer analysis has mass \(3.8\,\text{g}\) and molar mass \(42\,\text{g mol}^{-1}\). Calculate the amount of substance. 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.