What is the mole fraction of oxygen gas in air (see table 5.3 in the textbook)? express your answer using two significant figures?

Predict whether the changes in enthalpy, entropy, and free energy will be positive or negative for the boiling of water, and explain your predictions. how does temperature affect the spontaneity of this process?

What is the wavelength of a 3*10^12 hz infrared wave a 3*10^20m b 1* 10^4m c 3*10^-3m d 1*10^-4 m

Which statement are accurate about snow flakes