What is the mass of 9.76×1012 atoms of nitrogen?
1 Answer
Explanation:
To make this problem more interesting, let's calculate the mass of a single atom of nitrogen first, then use that value as a conversion factor to determine the mass of
The starting point here will be the molar mass of nitrogen, which is listed as
MM N=14.00674 g mol−1
This tells you that one mole of nitrogen has a mass of
1atom N⋅14.00674 g6.022⋅1023atoms N=2.326⋅10−23g
Now all you have to do is multiply this value by the number of atoms given to you to find
9.76⋅1012atoms N⋅2.326⋅10−23g1atom N=∣∣ ∣∣¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯aa2.27⋅10−10gaa∣∣−−−−−−−−−−−−−−−−
The answer is rounded to three sig figs.
