since gases exert the same pressure under the same conditions, we can say that .50 atm of gas A will react with .75 atm of gas B to form 1/2 the atm of A, which would be .25 (this is all according to stoichiometry of the reaction). There is a remaining .25atm of gas B, so the final pressure would be .50 atm.
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since gases exert the same pressure under the same conditions, we can say that .50 atm of gas A will react with .75 atm of gas B to form 1/2 the atm of A, which would be .25 (this is all according to stoichiometry of the reaction). There is a remaining .25atm of gas B, so the final pressure would be .50 atm.