Charles's Law states that at constant pressure, the volume of a fixed amount of gas varies directly with its temperature measured in degrees Kelvin. A gas has a volume of 250 mL at 300 K.
what is an equation for the relationship between volume and temperature?
constant = 250/300 mL/K
equation then is
V = constant * T
250 mL = constant * 300 K
constant = 250 mL/300 K = .833... mL/K
V = .833 T