Answer:
about 121.5 K or -151.7 °C
Explanation:
Volume of an ideal gas is proportional to the absolute temperature. At 67 °C, the absolute temperature is 67+273.15 K, or 340.15 K.
Then 50.0/140.0 times that temperature is ...
(5/14)(340.15 K) ≈ 121.482 K ≈ -151.668 °C
The volume would be 50.0 mL at a temperature of about 121.5 K or -151.7 °C.
