💏intro to chemistry review

key term - Avogadro’s law

Definition

Avogadro's law states that the volume of a gas is directly proportional to the number of moles of gas when temperature and pressure are held constant. Mathematically, it can be expressed as $V \propto n$ or $\frac{V}{n} = k$.

5 Must Know Facts For Your Next Test

  1. Avogadro's law explains the relationship between volume and amount (moles) of a gas.
  2. The law implies that equal volumes of all gases, at the same temperature and pressure, contain an equal number of molecules.
  3. It can be expressed with the equation $V_1 / n_1 = V_2 / n_2$ for two different states of a gas.
  4. The concept is crucial for understanding molar volume, which is 22.4 L at standard temperature and pressure (STP).
  5. Avogadro's number (6.022 x $10^{23}$) is derived from Avogadro’s hypothesis about equal volumes containing equal numbers of molecules.

Review Questions

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