Question

If there are 2 moles of Al(NO₃)₃, how many moles of nitrogen are there...

A) 2
B) 3
C) 6
D) 9

Answer 1

If there are 2 moles of Al(NO₃)₃, there are 6 moles of nitrogen because each formula unit of aluminum nitrate contains one aluminum atom and three nitrogen atoms.

Step-by-step explanation:

If there are 2 moles of Al(NO₃)₃, then to determine how many moles of nitrogen there are, we need to look at the chemical formula. Aluminum nitrate, Al(NO₃)₃, contains one aluminum (Al) atom and three nitrate (NO₃) groups per formula unit.

Since each nitrate group contains one nitrogen (N) atom, a single mole of Al(NO₃)₃ contains three moles of nitrogen. Therefore, if there are 2 moles of Al(NO₃)₃, we simply multiply the number of moles of the compound by the number of nitrate groups to find the number of moles of nitrogen.

2 moles Al(NO₃)₃ × 3 moles N/mole Al(NO₃)₃ = 6 moles of nitrogen.

So the answer to the question is C) 6 moles of nitrogen.