Determine the empirical formula of aluminium nitride.

Step 1: Identify the elements present in the compound. In this case, we have aluminium (Al) and nitrogen (N).

Step 2: Write down the symbols of these elements. Al N

Step 3: Write down the atomic masses of these elements. The atomic mass of aluminium is approximately 27 and that of nitrogen is approximately 14.

Step 4: Since the question does not provide the mass of each element in the compound, we will assume one mole of the compound. This means we have one mole of aluminium and one mole of nitrogen.

Step 5: The empirical formula is the simplest, most reduced ratio of elements in a compound. Since we have one mole of each element, the empirical formula of aluminium nitride is AlN.