# Chemistry

If 3.50 mol of A is mixed with 0.750 mol of B and the final pressure of the mixture is 3.25 atm, what are the partial pressures of A and B

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1. You don't say but I assume A and B are gases.
total mols = mols A + mols B
X(A) = mol fraction A = mols A/total mols.
XB = mols fraction B = mols B/total mols

pA = XA*Ptotal
pB = XB*Ptotal

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posted by DrBob222

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