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viktelen [127]
4 years ago
12

{Plz answer} Thank you!

Chemistry
2 answers:
Dafna11 [192]4 years ago
8 0

The Answer to your question would be A

Umnica [9.8K]4 years ago
7 0

I would say A. Hope this helps, and cya! :3

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The average distance a gas particle travels between collisions (with the wall or another particle) is called its?
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The average distance a gas particle travels between collisions (with the wall or another particle is called the mean free path.

According to the kinetic theory of gases, the particles of a gas (atoms or molecules) have the highest kinetic energy and travel at high speeds. At standard temperature and pressure, a gas particle can reach speeds of about 470m/s.

Despite the high speeds gas particles travel, it still takes a while for the fragrance of an opened perfume to diffuse to the other end of the room. This is because when moving, the molecules do not have a free path. They constantly collide with other particles and the walls of the container and change direction randomly. The average distance a single particle can travel without colliding with other particles, or the wall of the container is called the mean free path.

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3 years ago
3. You are preparing 285 mL of 70% (v/v) ethanol in water using a 95% ethanol stock. Round your answer to the nearest whole numb
attashe74 [19]

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a) 210 mL of 95% ethanol

b) 75 mL of water

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a) We can use the dilution equation to solve this problem. C₁ and V₁ are the concentration and volume of the stock solution, respectively, while C₂ and V₂ are the concentration and volume of the diluted solution.

C₁V₁ = C₂V₂

We want to find V₁, the volume of ethanol stock we need to dilute to prepare the final solution:

V₁ = (C₂V₂) / C₁

The concentrations are represented in percentages. We substitute in the known values to calculate V₁. The units cancel to leave us with units of mL.

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b) The final solution volume is 285 mL and we have added 210 mL of ethanol, so the remaining volume is from the water that we add:

(285 mL - 210 mL) = 75 mL

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