Which of the following contains greatest number of N atoms?

Options

A. 22.4 L nitrogen gas at STP
B. 500 mL of 2.00 M `NH_3`
C. 1.00 mol of `NH_(4) Cl`
D. `6.02 xx 10^(23)` molecules of `NO_(2)`

Answer

A

Explanation

A) 22.4 L `N_(2)` gas at STP = 1 mol `N_(2) = N_(0)` molecules of `N_(2) = 2 N_(0)` atoms of N
(B) `(500 xx 2)/(1000) = 1` mol of `NH_(3) = N_(0)` molecules of `NH_(3) = N_(0)` atoms of N
C) 1 mol of `NH_(4)Cl = N_(0)` atoms of N
D) `6.02 xx 10^(23) NO_(2)` molecules = `6.02 xx 10^(23)` atoms of N