Consider the following equilibrium:
2CO(g) + O2(g)<--> 2 CO2(g)
Keq= 4.0 * 10^-10
What is the value of Keq for 2CO2(g) <--> 2CO(g) + O2(g)?

Select one:
A. 4.0 * 10^-10
B. 2.5 * 10^9
C. 2.0 * 10^-5
D. 5.0 * 10^4

Aroom with dimensions 7.00m×8.00m×2.50m is to be filled with pure oxygen at 22.0∘c and 1.00 atm. the molar mass of oxygen is 32.0 g/mol. how many moles noxygen of oxygen are required to fill the room? what is the mass moxygen of this oxygen?