(Help) What is the change in elevation between points A and B? A) 900 m

B) 0 m

C) 100 m

D) 150 m

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