A reaction mixture at 175 K initially contains 522 torr of NO and 421 torr of O2. At equilibrium, the total pressure in the reaction mixture is 748 torr. Calculate Kp at this temperature. Express your answer to three significant figures.

Explanation:

Hello,

In this case, the undergoing chemical reaction is:

For which the equilibrium expression is:

Whereas, at equilibrium, each pressure is computed in terms of the initial pressure and the reaction extent via:

And the total pressure:

Yet it is 748 torr, for which the extent is:

Therefore, Kp turns out:

Best regards.

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !

is there any options? maybe im just not seeing them but i need the options to

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