No_2 decomposes by the following reaction: 2 no_2(g) → 2 no(g) + o_2(g) the rate constant at 273 k is 2. 3 x 10^{-12} m^{-1}s^{-1}, and e_a is 111 kj/mol. How many seconds will it take for the partial pressure of no_2(g) to decrease from an initial pressure of 2. 5 atm to 1. 5 atm at 500 k?.

Acar averages 22 miles per gallon. if gas costs $2.89 per gallon, which of the following is closest to how much the gas would cost for this car to travel 1,650 typical miles?

What percentage of the earth's water is available for use by living things?

Snakes, dogs, and humans have a vertebral column. snakes and dogs have tails, and humans have vestigial tailbones. dogs and humans have limbs, but snakes do not. most reptiles lay eggs, but a few give birth to live young. what do these structures suggest about the evolutionary pattern between the three organisms? 1. snakes and dogs are more closely related than snakes and humans. 2. snakes and humans are more closely related than humans and dogs. 3. dogs and humans are more closely related than snakes and humans. 4. dogs, snakes, and humans share a common ancestor. 5. the early ancestor of snakes and dogs is the same, and the early ancestor of humans is different.