Final answer:
To determine the number of nitrogen atoms in 2Zn(NO3)2, we calculate that each molecule of zinc nitrate contains 2 nitrogen atoms, and with a coefficient of 2 in front of the formula, there are a total of 4 nitrogen atoms.
Step-by-step explanation:
The question asks for the number of nitrogen atoms in a given chemical formula, specifically 2Zn(NO3)2.
To find the number of nitrogen atoms, we look at the chemical formula of zinc nitrate which is Zn(NO3)2.
The subscript '2' outside the parenthesis indicates there are two nitrate groups per molecule of zinc nitrate.
Each nitrate group has one nitrogen atom, as indicated by the chemical formula NO3.
Therefore, one molecule of zinc nitrate contains 2 nitrogen atoms. Since the coefficient in front of the formula is 2, we multiply the 2 molecules by the 2 nitrogen atoms in each molecule to get a total of 4 nitrogen atoms in 2Zn(NO3)2.