The hypothesis states that the fraction of
radioactive nuclei after n half-lives is 0.51
In this expression, the value 0.5 represents
the fraction of nuclei still radioactive after any
half-life cycle.
the fraction of nuclei still radioactive at the
start of the experiment.
the amount of time it takes half of the
radioactive atoms to decay.
the number of half-life cycles.
DONE

Summarize possible ways in which phases of matter could combine to form a solution.

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 .

The decimals you found in part b are called repeating decimals. in the gizmo, repeating decimals are rounded to two places. how does the gizmo show you that a decimal has been rounded?