Final answer:
Calculating the moles of nitrogen atoms in a 3.50-mole sample of a compound depends on the stoichiometry of nitrogen in that specific compound. For instance, in ammonia (NH3), there is a 1:1 ratio of nitrogen to the compound, so in 3.50 moles of ammonia, there are 3.50 moles of nitrogen atoms. Without knowledge of the specific compounds, we cannot determine the exact number of moles of nitrogen.
Step-by-step explanation:
The student's question is asking how many moles of nitrogen atoms are present in 3.50-mole samples of various compounds. To answer this question, one must consider the stoichiometry of nitrogen in each compound. Each compound will have a specific number of nitrogen atoms per molecule, which will determine how many moles of nitrogen atoms are present in the provided moles of the compound.
For example, considering the compound ammonia (NH3), for every 1 mole of ammonia, there is 1 mole of nitrogen atoms. Therefore, in 3.50 moles of ammonia, there would be 3.50 moles of nitrogen atoms.
However, without the specific compounds listed, we cannot provide a precise answer. Different compounds will contain varying amounts of nitrogen atoms, hence the stoichiometry varies. Calculating moles of nitrogen for different compounds requires knowing the compound's formula and how many atoms of nitrogen are present in one molecule of that compound.