Practice question · Estimate
One mole of water is 18 g, a small sip. Estimate the order of magnitude: how many molecules in that sip? Set the slider to the exponent in .
Estimate on a scale from 10¹⁰ (10) to 10³⁰ (30).
Hints
- One mole = Avogadro’s number of particles.
- , so the exponent is a touch under 24.
Show the answer
23.8 (answers within ±1 count)
Why
≈ molecules, an exponent near 23.8. For scale: that is millions of times more molecules in a sip than there are stars in the observable universe. The mole is the bridge between gram-scale lab work and molecule-scale reality.
Practise Representations from particles to formulas
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