日常生活中的科学
How can we count atoms we cannot see?
0.50 mol contains 3.01107038 × 10^23 specified entities because the Avogadro constant is exact.
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简短答案
0.50 mol contains 3.01107038 × 10^23 specified entities because the Avogadro constant is exact.
真正发生了什么？
For 2 H2 + O2 → 2 H2O, two moles of hydrogen react with one mole of oxygen in the balanced ideal ratio.
一个有用的直观图景
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Chemists connect microscopic particles to measurable amounts through the mole. The Avogadro constant fixes the number of specified entities in one mole exactly.