Question

the equation 2NO2 <---> N2O4 shows a system
A: in chemical equilibrium
B: in physical equilibrium
C: that does not reach equilibrium
D: that does not change

Please help

Answer 1

\[2NO_2\rightarrow N_2O_4\]
first tell me what are the numbers of N and O in the left hand side?

Answer 2

so there are 2 nitrogen and 4 oxygen atoms in 2NO2
and for N204
there's also 2 nitrogen and 4 oxygen
so there is same numbers of nitrogen and oxygen in both sides