Which of these expressions are correct variations of the Combined Gas Law?

Both

Explanation:

The combined gas law is also known as the general gas law.

From the ideal gas law we assume that n = 1;

So;

              PV  = nRT

 and then;

                   =

   If we cross multiply;

                P₁V₁T₂   = P₂V₂T₁

  So;

         T₁ =

Also;

         V₂  =

So from the choices both are correct

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