1. Avogadro's Number
* Avogadro's number tells us the number of particles (atoms, molecules, etc.) in one mole of a substance. It's a constant: 6.022 x 10²³ particles/mole.
2. Calculation
* Set up the equation:
Number of atoms = (moles of Na) x (Avogadro's number)
* Plug in the values:
Number of atoms = (0.188 moles Na) x (6.022 x 10²³ atoms/mole)
* Calculate:
Number of atoms = 1.13 x 10²³ atoms
Therefore, there are approximately 1.13 x 10²³ atoms in 0.188 moles of sodium.
