the reaction 2n2o5(g) → 2n2o4(g) + o2(g) obeys the rate law rate k[n2o5], in which the specific rate constant is 0.00840 s-1 at a certain temperature. a. if 2.50 moles of n2o5 were placed in a 5.00-liter container at that temperature, how many moles of n2o5 would remain after 1.00 minute? b. how long would it take for 90% of the original n2o5 to react?

Scientists observed a rock stratum and discovered some fossils. the image shows the fossils they discovered. what can you interpret from the image? an illustration showing layers rock with fossils embedded in some rock layers1. the dinosaur and the mammoth existed after the trilobites.2. the dinosaur and the armored fish existed before the trilobites.3. the trilobites and the armored fish died before the dinosaur.4. the trilobites and the armored fish were born after the dinosaur.5. the early mammoth is older than the trilobites.