Under which conditions of temperature and pressure does a sample of neon behave most like an ideal gas?
(1) 100 k and 0.25 atm
(2) 100 k and 25 atm
(3) 400 k and 0.25 atm
(4) 400 k and 25 atm

Since real gases behave least ideally at low temperature and high pressure, they would behave most like an ideal gas at high temperature and low pressure.
 Therefore, (3) 400K and 0.25 atm is the correct answer.
Hope this would help~

Woah that’s a lot to read xd i’ll try though. i’ll get back t you if. i know the andwer

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na