A plane starting from rest accelerates at a rate of 1.5 m/s2 for 40.0 s before taking off. What is the takeoff speed of the plane
A. 40.0 m/s
B. 50.0 m/s
C. 60.0 m/s
D. 70.0 m/s

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?

Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming natural gas. in the first step, nitrogen and hydrogen react to form ammonia: (g) (g) (g) in the second step, ammonia and oxygen react to form nitric acid and water: (g) (g) (g) (g) calculate the net change in enthalpy for the formation of one mole of nitric acid from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .

Concentrations expressed as a percent by mass are useful when the solute is a a. liquid b. gas c. solid