Areaction that is second-order in one reactant has a rate constant of 3.8 × 10–2 l/(mol ? s). if the initial concentration of the reactant is 0.280 mol/l, how long will it take for the concentration to become 0.140 mol/l?

Achemical equilibrium between gaseous reactants and products is shown. n2(g) + 3h2(g) ⇌ 2nh3(g) how will the reaction be affected if the pressure on the system is increased? it will shift toward the reactant side as there is lower pressure on the reactant side. it will shift toward the product side as there is higher pressure on the product side. it will shift toward the reactant side as there are a greater number of moles of gas on the reactant side. it will shift toward the product side as there are a fewer number of moles of gas on the product side.