QUESTION 15 Consider the following reaction: 2 N2O5(g) → 4 NO2(g) + O2(g)

if the rate constants at 25 and 45 °C are k25 °C = 3.7 x 10-5 s-1 and k45 °C = 5.1 x 10-4 s-1
Calculate the rate constant at 55 °C

A. 2.8 × 1047 s-1
B. 2.0 × 10-4 s-1
C. 6.1 × 10-1 s-1
D. 1.5 × 10-3 s-1

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer

Convert the temperature of dry ice, –77 ∞c, into degrees fahrenheit and kelvin.

In november 1987, a massive iceberg broke loose from the antartic ice mass and floated free in the ocean. the chunk of ice was estimated to be 98 mi long, 25 mi wide, and 750 ft thick. a typical backyard swimming pool contains about 24,000 gallons of water. how many of these pools could you fill from the water in this iceberg? (assume the iceberg is a rectangular solid of the above dimensions and consists of water only). express answer in scientific notation.