Question

28. If the total pressure of a mixture of four gases (neon, carbon dioxide, oxygen and hydrogen) is 1245 mm
Hg, what is the pressure of neon gas if the pressure of carbon dioxide is 145 mm Hg, the pressure of hydrogen is
499 mm Hg and the pressure of oxygen is 228 mm Hg?
A) 601 mm Hg
B) 746 mm Hg
C) 872 mm Hg
D) 373 mm Hg

Answer 1

Answer:

D) 373 mm Hg.

Explanation:

We can solve this problem by keeping in mind Dalton's law of partial pressures, which states that the total pressure of a mixture of gases is equal to the sum of each gas' partial pressures. In other words, for this case:

• Total Pressure = Ne Pressure + CO₂ Pressure + O₂ Pressure + H₂ Pressure

• 1245 mm Hg = Ne Pressure + 145 mm Hg + 228 mm Hg + 499 mm Hg

• Ne Pressure = 373 mm Hg

The answer is option D) 373 mm Hg.