A certain reaction is first order with a half-life of 57.9 minutes. If the initial concentration of the reactant is 0.85 M, what is the concentration after 35 minutes?

At a certain temperature the rate of this reaction is first order in HI with a rate constant of 7.09 s 2HI (g) - H, (g) +1, (g) Suppose a vessel contains HI at a concentration of 0.350M. Calculate how long it takes for the concentration of HI to decrease by 83.0%. You may assume no other reaction is important. Round your answer to 2 significant digits. Submit Assign MacBook Air F7 吕口。 D00 F4 F5 F3 吕 X

hello i am struggling with this one, can someone please help me?

A chemical engineer is studying the rate of this reaction. 2NH3 (g) → N₂ (g)+ 3H₂ (g) She fills a reaction vessel with NH3 and measures its concentration as the reaction proceeds. Here's a graph of her data: (W) [EHN] 0.20- 0.15- 0.10- 0.05- 0_ 20 60 t (s) 80 100

Consider a first-order decomposition of the substance A. It takes 60 min ufor the concentration of A to drop to half its initial value. How long, in total, will it take for the concentration of A to fall from its initial value to 12.5%? Select one: 1. 45 min 2. 15 min 3. 180 min 4. 120 min 5. None of the other answers

At a certain temperature this reaction follows first-order kinetics with a rate constant of 0.0424 s¯¹: S 2NH3(g) → N₂(g) + 3H₂(g) Suppose a vessel contains NH3 at a concentration of 0.460M. Calculate the concentration of NH3 in the vessel 17.0 seconds later. You may assume no other reaction is important. Round your answer to 2 significant digits. M x10 X 5

For the reaction below, a series of experiments was conducted and the data collected in the table below. a. Determine the rate law and the overall order of the reaction. b. Calculate the rate constant, including appropriate units. c. Determine the initial rate when the initial concentrations of both reactants are 0.12 M. Reaction (might be unbalanced): NO (g) + Cl2 (g) → NOCI (g) Experiment Data: Experiment # Initial [NO] (M) Initial [Cl2] (M) Initial Rate (M/s) 0.13 1.0x10-2 0.20 2 0.26 0.20 4.0x10-2 3 5.0x10-3 0.13 0.10

Consider a first order reaction AB }A+ B If the reaction is 34% complete at the end of 39 s, what is the length of the half-life of this reaction in seconds? Use 2 significant figures in your answer. Do not include the unit.