1. Identify the elements and their atomic masses:
* Sodium (Na): 22.99 amu
* Chlorine (Cl): 35.45 amu
* Oxygen (O): 16.00 amu
2. Determine the number of atoms of each element in the formula:
* Na: 1
* Cl: 1
* O: 4
3. Multiply the atomic mass of each element by the number of atoms of that element:
* Na: 22.99 amu * 1 = 22.99 amu
* Cl: 35.45 amu * 1 = 35.45 amu
* O: 16.00 amu * 4 = 64.00 amu
4. Add the results from step 3 to get the formula mass:
* Formula Mass of NaClO₄: 22.99 amu + 35.45 amu + 64.00 amu = 122.44 amu
Therefore, the formula mass of sodium perchlorate (NaClO₄) is 122.44 amu.
