Hello, My apologies for this long question. I couldn\'t seperate it into several

Question

Hello,

My apologies for this long question. I couldn't seperate it into several questions because it all connected.

Thank you so much for your help!!!

Ill. Different substances Before moving on you may want to remind yourself of the definition of an ideal gas A. Two identical cylinders of the type described above contain hydrogen Hydrogen Orkygen and oxygen, respectively. Both cylinders have been in the same room for a long time. Their pistons are at the same height. Compare the following quantities for the two cylinders. For each comparison that you make, check for consistency with what you know about forces, withtheideal gas law, and with common sense. Explain the basis for each comparison. volumes of the gases Number of moles of gas B. If you were to look up the molar masses of hydrogen and oxygen gas, you would find that they are 2 g (for H) and 32 g (for 1. What does the quantity 2 but what does that mean 2. Compare the masses of the gas samples in the two containers. Explain your reasoning. C. Pressure is exerted on the piston by gas molecules banging on it as they fly around in the container. Two students consider the scenario. Lara: The oxygen molecules are heavier, so they bang harder on the piston, creating more pressure. Dave But the pressure has to be the same in the two containers, since the pistons have the same weight. Who's right (or are they both right? Reconcile these competing arguments by identifying the correct parts of each and adding whatever's missing.

Explanation / Answer

A)
i) volume of gases: since both gases are in the identical cylinders and
the pistons are at the same height. So, the volume occupied by these two gases are same.

ii) Pressures: The pistons of the cylinders are at the same height. So, their pressures are also same.

iii) Temperatures: both the cylinders are in the same room for a long time. So, their temperature is also same.

iv) Number of moles of gases: From ideal gas equation, PV = nRT,
Pressures, volume and temperature are same, so the number of moles of both gases are also same.

B)

1) 2 g of Hydrogen gas means, the cylinder contains one mole of hydrogen gas. The mass of the gas is 2 g.

2) Since the number of moles of each cylinder is same so their mass will in the ratio of their molar masses.

If the hydrogen gas cylinder contains 2 g then the oxygen gas cylinder will be 32 g.

So, their mass ratio's are = 2/32 = 1:16

C) Dave's argument is correct. Because the pressures are same and the piston feels the same weight.

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