2.2 liters at 20 degrees celsius if the pressure doesn’t change what is the new temperature at 2.6 liters

Based on the question, it is evident that this question rests on the premise of Charle's Law, which essentially states that temperature is proportional to volume once pressure and mass remain constant.

Thus by Charle's Equation:   

Since the initial volume = 2.2 L; the initial temperature = 20 C; and the final volume = 2.6 L,
                           then V₁ = 2.2 L; T₁ = 20 C; V₂ = 2.6 L and what we would be
                           finding is T₂ (the final/new temperature)

Now,    

     ⇒   

     ⇒   

        ∴  the new temperature is ≈  23.6 °C

In any atom of any element, you will find protons and neutrons in the nucleus of any atom 

Answer(d) unstable compounds that convert to acetals in the presence of alcohol and an acid; (b) semiacetals produced by alcohol subtraction from ketone;