A 750 mL vessel contains 2.50 g of an unknown gas at a temperature of 0 C and pressure 300 mm Hg. A small sample of this gas is removed from the vessel and transferred into a new vessel at 500C and pressure 760 mm Hg. What is the density of gas after the transfer?
a. 7.14 g/L
b. 8.50 g/L
c. 6.55 g/L
d. 8.19 g/L