Question

4(a)(ii). A cylinder contains 2 moles of O2, 3 moles of CO2 and 5 moles of N2 at a particular temperature. If the pressure in the cylinder is 210 Nm-2, calculate the partial pressure of O2 and N2.

Accepted Answer

Total moles = 2+3+5 = 10 moles. Mole fraction of O2 = 2/10; Partial pressure of O2 = (2/10) x 210 = 42.0 Nm-2. Mole fraction of N2 = 5/10; Partial pressure of N2 = (5/10) x 210 = 105 Nm-2.

WAEC Chemistry 2025 Theory — Question 40

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