Mole Concept

Chemistry — topic guides, questions, and exam chapters with this tag

Topic guide

The Mole Concept — Counting Atoms the Chemistry Way

Master the mole concept with conceptual clarity, solved examples, and exam strategies.

Solved questions

How many molecules in 36g of water

easy

Find empirical formula from percentage composition: C=40% H=6.7% O=53.3%

easy

20g of CaCO₃ reacts with HCl — find volume of CO₂ at STP

hard

If 5.6L of gas at STP has mass 11g — find molecular mass

medium