Question

a mixture of h₂ and water vapor is present in a closed vessel at 20.00°c. the total pressure of the system is 755.0 mmhg. the partial pressure of the water vapor 17.50 mmhg. what is the partial pressure of h₂? type in your answer using the correct number of significant figures. mmhg done

Explanation:

Step1: Apply Dalton's Law of Partial Pressures

Dalton's law states total pressure equals sum of partial pressures: $P_{total} = P_{H_2} + P_{H_2O}$

Step2: Rearrange to solve for $P_{H_2}$

$P_{H_2} = P_{total} - P_{H_2O}$

Step3: Substitute given values

$P_{H_2} = 755.0\ \text{mmHg} - 17.50\ \text{mmHg}$

Answer:

737.5 mmHg