Question

How many nitrogen (N) atoms are there in 2.10 moles of nitrogen molecules (N2)?

Answer 1

`2.53 × 10^24\ "atoms"`

Explanation:

`"1 mol" = 6.022 × 10^23`

`"1 mol N"_2` molecules contains `"2 mol"` of nitrogen atoms.

Number of molecules in `"2.1 mol of N"_2\ "molecules"`

`2.1 cancel"mol molecules" × (6.022 × 10^23\ "molecules")/(1 cancel"mol molecules") = 1.26 × 10^24\ "molecules"`

Number of nitrogen atoms in `1.26 × 10^24\ "N"_2\ "molecules"`

`1.26 × 10^24\ cancel"molecules" × "2 atoms"/cancel"molecules" = color(blue)(2.53 × 10^24\ "atoms")`