A chemistry graduate student is studying the rate of this reaction:
2NH$_3$(g) → N$_2$(g) + 3H$_2$(g)
She fills a reaction vessel with NH$_3$ and measures its concentration as the reaction proceeds:
time (seconds) [NH$_3$]
0 0.0200 M
1.0 0.00986 M
2.0 0.00486 M
3.0 0.00240 M
4.0 0.00118 M
Use this data to answer the following questions.
Write the rate law for this reaction.
rate = k
Calculate the value of the rate constant $k$.
k =
Round your answer to 2 significant digits. Also be sure your answer has the correct unit symbol.