please help within five minutes 25

At a particular temperature, K = 1.00×102 for the reaction:

H2(g) + F2(g)> 2HF(g)

2 and 1.90 mol of F2 are introduced into a 1.25-L flask and allowed to react. At equilibrium, all species remain in the gas phase.
What is the equilibrium concentration (in mol/L) of H2?
2.53×10-1 mol/L

 

What is the equilibrium concentration (in mol/L) of HF?
 mol/L

To the mixture above, an additional 9.50×10-1 mol of H2 is added.What is the new equilbrium concentration (in mol/L) of HF

 
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