Use the graph below to calculate the relative humidity if the water vapor density at 25 ᵒC is 0.5 mol/1000L. 0.5/1.3 x 100
1.3/0.5 x 100
25/1.3 x 100
1.3 /25 x 100

Suppose the universe were completely empty except for one object-a solid sphere moving through space of 100 km/s. what sort of path would the object be moving in? explain your answer

Calculate the energy required to ionize a hydrogen atom to an excited state where the electron is initially in the n = 5 energy level. report your answer in kilojoules

The activation energy for the reaction no2(g)+co2(g)⟶no(g)+co(g) is ea = 300 kj/mol and the change in enthalpy for the reaction is δh = -100 kj/mol . what is the activation energy for the reverse reaction?