Which of these has NOT been used as an astronomical observatory?

A. Kitt Peak

B. Point Reyes

C. Stonehenge

D. The Round Tower

Consider the reaction: n2(g) + o2(g) ? 2no(g) kc = 0.10 at 2000oc starting with initial concentrations of 0.040 mol/l of n2 and 0.040 mol/l of o2, calculate the equilibrium concentration of no in mol/l how would this be done?

What layer of the atmosphere is directly above the troposphere?

Hey guys so i need to know what is _nh3+> nh4oh ~chemistry~