The dissociation constant of weak monobasic acid is 2.7 $$\times$$ 10$$^{-5}$$. If degree of dissociation of acid is 3 $$\times$$ 10$$^{-2}$$, what is the concentration of acid?

Identify order of reaction if it's rate constant is x sec$$^{-1}$$.

What is IUPAC name of following compound?

Enthalpy of formation of methane is $$-$$75 kJ/mol. What is the enthalpy change for formation of 24 g of methane?