Pls help (100 points) Given these reactions:

NO (g) + O3 (g)→NO2 (g) + O2(g), ΔH =−199 kJ

O3 (g)→32O2 (g), ΔH =−142 kJ

O2 (g)→2O (g), ΔH =+495 kJ

What is the ΔH for this reaction?

NO (g) + O (g)→NO2 (g)

−304 kJ

−199 kJ

+154 kJ

+438 kJ

The skeletal system performs a variety of functions that are crucial to maintaining life processes. what function is performed in the bone marrow, but not in the ossified bones of the skeleton? a oxygen transportation c mineral storage b. muscle attachment d red blood cell production

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.

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