Estimate the value of the rate constant k. Express your answer in liters per mole per second to three significant figures. for Part for Part do for Part k= 0.49 redo for eart C resor Part C keyboard shortcuts for Part C help for Part C Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining M-¹81

ent Score: 19 of 19 > Q Search *- Using the data in the table, calculate the rate constant of this reaction. % 5 FS 84.7% T B A+B C+D k = ** 6 F6 Y H 08 N F7 & 7 U C IM F8 * 8 @ 11 K ( 9 8 F10 O 0 F11 P U Trial 1 2 3 Units F12 [A] (M) 0.200 0.200 0.340 [B] (M) 0.210 0.525 0.210 M2S-1 Rate (M/s) 0.0239 0.149 0.0406 Soafers ENG 70 Atten Shift 3:27 PM 2/8/2024 JUL

A+B → Products Run 1 2 3 [A]o [B] (M) (M) 1 1 2 1 2 1 Initial Rate (M/sec) 1 2 4 Rate = k [A]² [B]. What is k (don't forget the units) = [k]?

1C. Effect of Catalyst Catalytic material to be tested Catalyst present (Yes or NO) Test Observation tube # Reference Clear solution, No fizzing (plain H2O2) NO 2 KI fast evolution Vigorous fizzing, gas/bubbles of yes yes NO Vigorous fizzing, Very fast evolution of gas/bubbles 3 PbO2 Copper wire No Change, No fizzing, No bubbles 5 Fresh potato Moderate fizzing, slow bubbles evolution yes yes Boiled potato Very slow fizzing, Few bubbles Which substance is the most catalytically active for H2O2 decomposition? Question 5. Arrange the five tested materials in order of increasing catalytic activity. Question 6. Explain for the difference in your observations between test tubes 5 and 6.