An 8.40-g sample of argon and an unknown mass of H2
are mixed in a flask at room temperature. The partial pressure
of the argon is 44.0 kPa, and that of the hydrogen is
57.33 kPa. What is the mass of the hydrogen?

Question

Accepted Answer

everyone to have a sample of neon and oxygen gas and it's mixed in a closed container. They have the mass and partial pressure. The oxygen gas Which is 7.56 g and 3.59 pascal. You asked to determine the mass of the Neon sample if it's partial pressure is 8. to pascal. The hair getting is the ideal gas law, which is P. V. It was N. R. T. We're looking at pressure and molds here. So we have P over in vehicles are T. V. 02 With the pressure of 0.2. What about Malls of 0. 2? You go to R. T bi bi bi. And this is constant for neon with the pressure of neon by the malls of neon and it's equal to R. T. Might be. And these are constant so we cancel them out. And now we can set these two equations equal to each other. We're gonna get the pressure of 0.2 gas provided by most of the gas. It was the pressure of neon gas. What about most of neon gas? We'll call that number of moles. It was a mass. Thought about Mueller mass. The number of moles of 0.2 People. grams. What about the molar mass of 0.2, which is to Some 15.999 grams. It goes 32 fans from all. Just give us 0.2363 malls of 02. The malls of neon gas. Because the pressure of neon gas times the number of moles of gas by the pressure of oil to gas, the number of most of neon gas. It was 8.92 pascal Time 0.23 63 walls. By by 3.59 pascal got a number of moles of N. E. It was 0.58 71 moles. So now we need to convert from walls of neon gas two g of neon gas. It was 0.58 71 most of neon And in one mode of neon, The Miller mass, which is 20.180 grams of neon. This gives us 11.8 g. Thanks for watching my video and I hope it was helpful.

An 8.40-g sample of argon and an unknown mass of H2 are mixed in a flask at room temperature. The partial pressure of the argon is 44.0 kPa, and that of the hydrogen is 57.33 kPa. What is the mass of the hydrogen?

Verified Solution

Key Concepts

Dalton's Law of Partial Pressures

Ideal Gas Law

Molar Mass and Mass Calculations