Which statement best explains why the following reaction is not likely to occur in a single step?
2C6H6(1) +15 O2(g) — 12 CO2(g) + 6 H2O(g)
→
A. None of the listed answers are correct
B. Exothermic reactions typically require several steps.
C. The reaction is spontaneous and is not reversible.
D. Gases do not usually react directly with liquids or solids.
E. The 17-body collision required is extremely unlikely.

Consider the elements bromine and chlorine; which elements has a larger ionic radius ?

15. which of the following is not human-caused groundwater pollution? a. water in an aquifer dissolves elements such as arsenic and mercury from surrounding rock. b. water in an aquifer is contaminated by leachate that seeps into the ground from a landfill. c. water in an aquifer becomes polluted with chemicals used in hydraulic fracturing, or fracking. d. water in an aquifer absorbs harmful bacteria from the drainage field of a septic tank.

What is the enthalpy of combustion (per mole) of c4h10 (g)? –2,657.5 kj/mol –5315.0 kj/mol –509.7 kj/mol –254.8 kj/mol