Question

A sample of air has a volume of 140.0 mL at 67C. To w

hat temperature must the gas
be lowered to reduce its volume to 50.0 mL at constant pressure?​

Answer 1

What that means is that when pressure and number of moles are kept constant, increasing the temperature will result in an increase in volume. Likewise, a decrease in temperature will result in a decrease in volume. In your case, the volume of the gas decreased by a factor of about 3, from "140.0 mL" to "50.0 mL".