The first-order rearrangement of ch3nc is measured to have a rate constant of 3. 61 x 10-15 s-1 at 298 k and a rate constant of 8. 66 × 10-7 s-1 at 425 k. Determine the activation energy for this reaction.

Susie ran a race. she ran 55 miles an hour, and the race took her tt hours to complete.

The graph shows a trend in an ecosystem over time caused by increased pollution in the region. what can you conclude from the graph? a. there’s lower biodiversity among birds. b. there’s a higher reproductive rate among birds. c. there’s a significant decline in the number of producers. d. other types of animals were unaffected by pollution.

Of the population of the united states is obese. a. 10% b. 25% c. 33% d. 50% select the best answer from the choices provided. a b c d