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Dalton’s law
in a mixture of gases, the total pressure is equal to the sum of the partial pressures of each gas
Formulas to find the total pressure
Answer
IF ALL CONTAINERS HAVE IDENTICAL CONDITIONS

Partial pressure formula
Pa = Xa times Ptotal
(mol fraction of gas A times total pressure)
Mol fraction formula
Xa = na/ntotal
(number of mols of gas a/total number of mols)