Question

If the pressure of a 2.00 L sample of gas is 50.0 kPa, what pressure does the gas exert if its volume is decreased to 20.0 mL?

Which equation should you use?

Answer 1

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Which equation should you use?

B. P₁V₁=P₂V₂

What is the new pressure?

✔ 5000 kPa

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Step-by-step explanation:

The problem gives initial volume (2.00 L), final volume (20.0 mL), and initial pressure (50.0 kPa). Then it asks to find the final pressure. Answer B has all these variables, with P₁=initial pressure, P₂=final pressure, V₁=initial volume, and V₂=final volume. Plug the given values into the equation and then solve for the unknown value, which is P₂, final pressure.

When plugging in the values, use consistent units. 2L=2000 mL, I chose to make the consistent unit in mL. You'll get the same answer if you choose to use L as the consistent unit.

`2000*50=20*P2`

`100000=20*P2`

Divide both sides by 20

`100000/20=(20*P2)/20`

`5000=P2`

Here's a photo of Edge just incase.