Asample of 0.900 mol n2o is placed in a sealed
container, where it decomposes irreversibly to n2 and o2
in a first-order reaction. after 42.0 min, 0.640 mol n2o
remains. how long will it take for the reaction to be
90.0% complete?

Organisms that live in the alpine and taiga biomes have developed unique adaptations that aid in their survival. moss campion is one of the plants found in the alpine biome. it has small leaves and a cushion shape that protect it from the wind and freezing temperatures in the alpine. how has the moss campion adapted to enable its survival in the alpine biome? a. waxy needles b. cone-shaped c. thin trunks d. low-growing

When casey looks at a cd or dvd she notices that there is a rainbow pattern that is created by the light. she became curious and shone light directly at it and a pattern was created on the wall. what is the cause of this pattern?

Imagine that you are buying books one by one and then piling them up after reading them. which geologic concept could you use to identify the topmost book as the newest?