General Chemistry · Module 1 · Measurement, units and dimensional analysis

Measurement Walkthrough

See matter from the beaker down to the atoms, then learn the tools every chemist uses: units, prefixes, significant figures, density, temperature and dimensional analysis. Go at your own pace. Nothing here is graded.

Speed

Think of it like this

Quick check

Wrong answers are fine here. Read why, then try again.

Dr. Akash Garg · General Chemistry Study Tools · Particle drawings are simplified and not to scale. CC BY-NC-SA 4.0
Use the left and right arrow keys to move between steps. Practice next in the Measurement Lab. Atoms are drawn as coloured balls with their symbols (hydrogen white, carbon dark grey, oxygen red, nitrogen blue, chlorine green, sodium purple). Particle motion is slowed down or sped up so you can watch it, and particles are drawn far larger than real life.