Under certain conditions the rate of this reaction is zero order in hydrogen iodide with a rate constant of 0.0045 M·s: 2 HI (g) - H, (g) +I, (g) Suppose a 250. mL flask is charged under these conditions with 250. mmol of hydrogen iodide. How much is left 60. s later? You may assume no other reaction is important. Be sure your answer has a unit symbol, if necessary, and round it to 2 significant digits.

Consider the reaction: 2N205(g)4NO2(g) + O2(g) At a particular temperature, the rate constant is 3.81 x 10s. If the initial concentration of N205 is 0.0212 M, calculate the concentration (in M) of N,05 after 882 seconds at this particular temperature. Please express the answer in scientific notation. If the answer is 2.5 x 102, express the answer as 2.5E-2. O Respond with the correct number of significant figures in scientific notation (Use E notation and only 1 digit before decimal e.g. 2.5E5 for 2.5 x 10") Type your numeric answer and submit

Consider this reaction: 2HI (g) → H₂(g) + 12₂ (8) At a certain temperature it obeys this rate law. rate = (0.0257 s¹) [HI] S d Suppose a vessel contains HI at a concentration of 0.180M. 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. x10 X S ?

Please answer both.

At a certain temperature the rate of this reaction is second order in NH, with a rate constant of 0.191 M 2NH, (g) → N₂(g) + 3H₂(g) Suppose a vessel contains NH, at a concentration of 1.11 M. Calculate how long it takes for the concentration of NH, to decrease by 76.0%. You may assume no other reaction is important. Round your answer to 2 significant digits. 0. OP X G a

Under certain conditions the rate of this reaction is zero order in ammonia with a rate constant of 0.0056 M ·s ': 2 NH, (g) → N, (g) + 3 H, (g) Suppose a 4.0 L flask is charged under these conditions with 200. mmol of ammonia. How much is left 2.0 s later? You may assume no other reaction is important. Be sure your answer has a unit symbol, if necessary, and round it to 2 significant digits. x10 ?

At a certain temperature the rate of this reaction is first order in NH3 with a rate constant of 0.354 s : 2NH3(g) → N₂ (g) + 3H₂(g) Suppose a vessel contains NH3 at a concentration of 0.380M. Calculate the concentration of NH3 in the vessel 2.50 seconds later. You may assume no other reaction is important. Round your answer to 2 significant digits. M x10 X

At a certain temperature the rate of this reaction is second order in HI with a rate constant of 0.22M¹s¹: 2 HI(g) → H₂(g) + 1₂ (8) Suppose a vessel contains HI at a concentration of 0.910M. Calculate how long it takes for the concentration of HI to decrease to 0.064 M. You may assume no other reaction is important. Round your answer to 2 significant digits. 0.9 X 圖 图

Under certain conditions the rate of this reaction is zero order in dinitrogen monoxide with a rate constant of 0.0028 M's : 2 N,0 (g) → 2 N, (g) +O, (g) Suppose a 4.0L flask is charged under these conditions with 400. mmol of dinitrogen monoxide. After how much time is there only 200. mmol left? You may assume no other reaction is important. Be sure your answer has a unit symbol, if necessary, and round it to 2 significant digits. x10

- 1 Under certain conditions the rate of this reaction is zero order in ammonia with a rate constant of 0.0075 M's 2 NH3(g) → N2(g)+3H2(g) Suppose a 350. mL flask is charged under these conditions with 450. mmol of ammonia. After how much time is there only 225. mmol left? You may assume no other reaction is important. Be sure your answer has a unit symbol, if necessary, and round it to 2 significant digits. x10