Using the standard heats of formation below, what is the heat of reaction when sulfur dioxide reacts with oxygen to form sulfur trioxide? 2so2(g) + o2(g) → 2so3(g) ∆hf° so2(g) = –298.8 kj/mol ∆hf° so3(g) = –395.7 kj/mol –193.8 kj –201.9 kj –492.6 kj –694.5 kj

The human eye contains a molecule called 11-cis-retinal that changes shape when struck with light of sufficient energy. the change in shape triggers a series of events that results in an electrical signal being sent to the brain that results in vision. the minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164 kj/mol.

What the blanks in these lines are ?

How many grams of sodium chloride are in 250ml of a 2.5m naci solution