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The footprints of a dinosaur and the burrow of an ancient shrimp are examples of which kind of fossils

At a certain temperature the rate of this reaction is first order in hi with a rate constant of : 0.0632s2hig=h2g+i2g suppose a vessel contains hi at a concentration of 1.28m . calculate how long it takes for the concentration of hi to decrease to 17.0% of its initial value. you may assume no other reaction is important. round your answer to 2 significant digits.

The point along a planet's orbit where it is closest to the sun is called the