Which of the following is not a characteristic of reliable science

According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons

Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming natural gas. in the first step, nitrogen and hydrogen react to form ammonia: (g) (g) (g) in the second step, ammonia and oxygen react to form nitric acid and water: (g) (g) (g) (g) calculate the net change in enthalpy for the formation of one mole of nitric acid from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .

What is the measured amount of a product obtained from a chemical reaction?