An evacuated reaction vessel is filled with 0. 800 atm of n₂ and 1. 681 atm of br₂. When equilibrium is established according to the reaction below, there are 1. 425 atm of br₂ remaining in the vessel. What is the equilibrium partial pressure of nbr₃? 2 nbr₃ (g) ⇌ n₂ (g) + 3 br₂ (g).

Astudent noticed different gas prices as she drove around town. find the second quartile. $3.31 $3.28 $3.42 $3.35 $3.31 $3.26 $3.38 $3.32 $3.34

In the image, layer a is the topmost layer. layer c contains fossils from the precambrian era. layer b contains dinosaur fossils, and layer a contains fossils of mammals. which two statements are supported by this evidence? 1. mammals lived before the precambrian era. 2. dinosaurs and mammals existed in the precambrian era. 3. dinosaurs evolved after precambrian organisms. 4. precambrian organisms evolved after dinosaurs. 5. precambrian organisms were the first life-forms to become fossilized, according to this sample.

How many liters of 60% alcohol solution should be added to 40 liters of a 20% alcohol solution to make a 50% solution?