A gas mixture containing oxygen, nitrogen, and neon exerts a total pressure of 1.20 atm. If helium added to the mixture increases the
pressure to 1.50 atm, what is the partial pressure, in atm, of the helium?
O a. 1.30 atm
O b. 1.50 atm
Oc. 2.30 atm
0 d. 0.30 atm