The decomposition of dinitrogen pentoxide, n2o5, to no2 and o2 is a first-order reaction. At 60°c, the rate constant is 2. 8 × 10-3min-1. If a rigid vessel initially contains only n2o5 at a pressure of 125 kpa, how long will it take for the total pressure to reach 155 kpa?.

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.

Land is to arable ; river is a, navigable b, shallow c, presumsor d, water

In a cooking context, which of the following materials is the best heat conducter?