What is the enthalpy of reaction for the decomposition of NO2(g)?

2NO2(g) --> N2(g) + 2O2(g)
kJ?

This reaction is?endothermic or exothermic

How many moles of magnesium is 3.01 x10^22 atoms of magnesium?

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?

Which of these statements best explains why space exploration should be encouraged? it prepares humans to live without oxygen. it dispel myths about objects in space. it prevents comets and asteroids from striking earth. it creates technology to absorb harmful radiations in space.