Which sequence correctly ranks the following dienes in order of increasing reactivity in the Diels-Alder reaction?

Which of the following statements best describes the term suprafacial?

What is the order of increasing heat of hydrogenation?  

What is/are the product(s) from the following reaction?

What is the name of the HOMO in a ground state conjugated pentaene?  

What is the thermodynamic product obtained from the following reaction

Describe a cycloaddition reaction.

Automotive air bags inflate when sodium azide decomposes explosively to its constituent elements: 2NaN3 (s) → 2Na (s) + 3N2 (g)How many grams of sodium azide are required to produce 28.0 g of nitrogen?

The wavelength of light emitted from a traffic light having a frequency of 2.74 × 1014 Hz is ________ nm. Constants: c = 3.00 x 108 m/s h = 6.626 x 10-34 Js

Given the following reactionsFe2O3 (s) + 3CO (s) → 2Fe (s) + 3CO2 (g)ΔH = -28.0 kJ 3Fe (s) + 4CO2(s) → 4CO (g) + Fe3O4(s)ΔH = +12.5 kJthe enthalpy of the reaction of Fe2O3 with CO 3Fe2O3 (s) + CO (g) → CO2 (g) + 2Fe3O4 (s)is ________ kJ.