Which of these statements about reaction rates is accurate?

(a) all chemical reactions occur at different rates.
(b) all chemical reactions occur at the same time.
(c) all chemical reactions occur at a slow rate.
(d)all chemical reactions occur at a fast rate.

Which uses electromagnetic radiation to discover the properties and composition of bodies in space? space probe space station space shuttle space observatory

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 .

How do you determine the percent yield of a chemical reaction