A sample of oxygen gas occupies 200cm3 at 2700 what will the volume be at 127o at the same pressure ?

To solve this problem, we can use the combined gas law formula:

(P1 * V1) / T1 = (P2 * V2) / T2

Where:
P1 = initial pressure
V1 = initial volume
T1 = initial temperature
P2 = final pressure
V2 = final volume
T2 = final temperature

Given:
P1 = P2 (same pressure)
V1 = 200 cm3
T1 = 270 K
T2 = 127 K

Plugging in the values:

(200 * 270) / 270 = (V2 * 127) / 127

200 = V2

Therefore, the volume of oxygen gas at 127oC at the same pressure will be 200 cm3.