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Daniel [21]
3 years ago
14

The pressure of a gas is 750.0 torr when its volume is 400.0 mL. What is the pressure if the gas is allowed to expand to 600.0 m

L at constant temperature?
Chemistry
1 answer:
Anna11 [10]3 years ago
8 0
Pv = constant
P pressure
V volume
If you would increase volume for 1.5 times - pressure will drop 1.5 times
750 divide 1.5
Equals 500
Pressure will become 500 torr
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Answer:

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Explanation:

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Br₂ changes the oxidation state from 0 to -1, so it was reduced

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Electrons are unbalanced so we multiply reduction x4, and oxidation x1.

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(5H₂O + S₂O₃²⁻ → 2SO₄²⁻ + 10H⁺ + <em>8e</em>-) . 1 = STAYS THE SAME.

We sum both half reactions, to cancel the elecetrons:

4Br₂ + 8e⁻ + 5H₂O + S₂O₃²⁻  → 2SO₄²⁻ + 10H⁺ + <em>8e</em>- + 8Br⁻

Finally the balanced reaction is: 4Br₂+ 5H₂O+ S₂O₃²⁻ → 2SO₄²⁻ + 10H⁺ + 8Br⁻

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