# can some please help me with chemistry ?

Calculate the volume of a 1.00 L sample of gas after its pressure is decreased by 20%and its absolute temperature is decreased by 2%?

### 3 Answers

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- 3 weeks agoBest answer
P * V = n * R * T

P[1] * V[1] = n * R * T[1]

P[1] * V[1] / T[1] = n * R

P[2] = 0.8 * P[1]

T[2] = 0.98 * T[1]

P[2] * V[2] = n * R * T[2]

0.8 * P[1] * V[2] = n * R * 0.98 * T[1]

0.8 * P[1] * V[2] / (0.98 * T[1]) = n * R

0.8 * (P[1] / T[1]) * V[2] / 0.98 = P[1] * V[1] / T[1]

0.8 * V[2] / 0.98 = V[1]

V[2] = V[1] * 0.98 / 0.8

V[2] = V[1] * (98/80)

V[2] = 1 * (98/80)

V[2] = 490 / 400

V[2] = 49/40

V[2] = 245 / 200

V[2] = 1.225

1.23 Liters

- Anonymous3 weeks ago
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