2 NOCl(g) → 2 NO(g) + Cl2(g) ΔH° = +75.56 kJ 2 NO(g) + O2(g) → 2 NO2(g) ΔH° = -113.05 kJ
2 NO2(g) → N2O4(g) ΔH° = -58.03 kJ
Compute ΔH° of N2O4(g) + Cl2(g) → 2 NOCl(g) + O2(g) in kJ.

The peak wavelength for the blackbody curve of a star is in the uv range. assuming the radiation from this star can reach earth, would you be able to see it?

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

When the chemicals iron sulfide (fes) and hydrochloric acid (hcl) are combined, bubbles appear from the mixture. 1. does the appearance of bubbles indicate a physical or chemical change? 2. why do the bubbles indicate this change? 3. what property is this?