Which sample contains a total of 3.0 x 10^23 molecules? a) 14 grams of nitrogen gas
b) 14 grams of lithium
c) 4 grams of hydrogen gas
d) 4 grams of helium

8) a mixture of he, ne and ar has a pressure of 7.85 atm. if the ne has a mole fraction of 0.47 and 8) ar has a mole fraction of 0.23, what is the pressure of he? a) 4.2 atm b) 3.7 atm c) 5.5 atm d) 2.4 atm e) 1.8 atm

Adilute aqueous potassium nitrate solution is

Ineed ! i have no clue how to do this problem.