What is reason behind the slow decomposition of nitrogen peroxide in nitric acid

Environmental damage. Nitric acid is also produced in the environment through the reaction between nitrogen and oxygen during lightning storms. Due to its highly reactive properties, it degrades within a few days and does not accumulate in plants and animals.

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

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1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.