Use Hess’s Law to calculate the heat of reaction, ∆HRXN, for the following chemical process: NO(g) + O(g) → NO2(g)

using the information given below:
NO(g) + O3(g) --> NO2(g) + O2(g) DeltaH = -198.9 kJ / mol
O3(g) --> O2(g) DeltaH = -142.3 kJ / mol
O2(g) --> 2 O(g) DeltaH = +495 kJ / mol

Base your answer on the information below and on your knowledge of chemistry. nitrogen dioxide, no2, is a dark brown gas that is used to make nitric acid and to bleach flour. nitrogen dioxide has a boiling point of 294 k at 101.3 kpa. in a rigid cylinder with a movable piston, nitrogen dioxide can be in equilibrium with colorless dinitrogen tetroxide, n2o4. this equilibrium is represented by the equation below. 2no2(g) n2o4(g) + 58kj at standard pressure, compare the strength of intermolecular forces in no2(g) to the strength of intermolecular forces in n2(g).

Which is an example of the practical pursuit of alchemy? a. forming perfect substances. b. transforming base metals. c. developing metalworking techniques. d. linking spiritual characteristics with material substances.

What is the common name for the compound shown here? enter the common name of the compound shown?