1. Convert grams to moles:
* Find the molar mass of NaCl:
* Sodium (Na) has a molar mass of 22.99 g/mol.
* Chlorine (Cl) has a molar mass of 35.45 g/mol.
* Molar mass of NaCl = 22.99 g/mol + 35.45 g/mol = 58.44 g/mol
* Divide the mass of NaCl by its molar mass:
* Moles of NaCl = 38 g / 58.44 g/mol = 0.65 mol
2. Convert moles to formula units:
* Use Avogadro's number: There are 6.022 x 10^23 formula units in one mole of any substance.
* Multiply the number of moles by Avogadro's number:
* Formula units of NaCl = 0.65 mol * 6.022 x 10^23 formula units/mol = 3.91 x 10^23 formula units
Therefore:
* 38 grams of NaCl is equal to 0.65 moles.
* 38 grams of NaCl is equal to 3.91 x 10^23 formula units.
