Please Help! My question is attached below.

Which best describes why nh4+ can form an ionic bond with cl-?

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

Determine the reaction and balance the following equations urgent due in the morning