The rate law for the reaction nh4(aq)+ + no2(aq)- → h2o(l) + no2(g) is rate = k [nh4+][no2-], and the value of k is 2.7*10-4 m-1s-1. what is the rate of reaction when [nh4+] = 0.050 m and [no2-] = 0.25 m?

If a molecule with a molecular formula of c13h18 is treated with an excess of h2 in the presence of finally divided pt metal under conditions required for maximum hydrogenation of the molecule to give a molecule with a formula c13h24, how many rings are in the molecule?