Unit Not Homogeneous: Understanding the Formula

[KingTubby]

Hello!
I was reading an article from Wikipedia(https://en.wikipedia.org/wiki/Lapse_rate) and the formula

seems to me not homogenous since g is in m/s² and cp in J/K=(kg*m²)/(K*s²) so at the end, we'll get K/(kg*m).

How they get rid of kg^-1 ?
Thanks

 

[mjc123]

c_p is stated to be the specific heat, i.e. per unit mass, so its units are J/(kg K).