The enthalpy change for the reaction of hydrogen gas with fluorine gas to produce hydrogen fluoride is 2542 kJ for the equation as written: H2(g) + F2(g) → 2HF(g) ΔH = 2542 kJ

a. What is the enthalpy change per mole of hydrogen fluoride produced?

b. Is the reaction exothermic or endothermic as written?

c. What would be the enthalpy change for the reverse of the given equation (that is, for the decomposition of HF into its constituent elements)?

George is a dalmatian puppy. describe what happens to light that allows you to see george’s black and white coat.

If we compare and contrast electromagnetic waves with sound waves, all but one statement is true. that is a) sound waves require a medium to travel while electromagnetic waves do not. b) electromagnetic waves can travel through the vacuum of space while sound waves cannot. c) electromagnetic waves must have a medium in which to travel, but sound waves can travel anywhere. eliminate d) sound waves must bounce off of matter in order to travel while electromagnetic waves do not require matter to be present.

Explain in detail of the four major scientific developments that spurred the formulation of the plate tectonics theory