Competency Review Question 1Evaluation Time 00:05 Answer each question to the best of your ability. You can answer each question as many times as you like until you submit on the final page at which time your answers will be locked. Question 1 of 15 1. During a chemical reaction, atoms of chemicals . interact with one another rearrange to form new substances both interact with one another and rearrange to form new substances

Ithink the answer is pollution in the air steel made of iron and carbon

Ithink iit might be

Visible light is located in the middle of the spectrum.

Reaction involved in present system is :   c12h22o11 + h2o → 2 c6h12o6the reaction system is obeying following rate law:   rate = k[c12h22o11]thus, it is a first order reaction.now, for 1st order reactionrate constant (k) =  given: initial conc. = 3.0 g, final conc. = 2.7 g, t = 2.5 h∴rate constant (k) =  ∴ k = 0.04215 h-1now, for 1st order reaction, half life = 0.693/k = 0.693/0.04215 = 16.4 hthus correct answer is option b