A certain substance X has a normal freezing point of 1.4 °C

Last updated: 7/10/2022

A certain substance X has a normal freezing point of 1.4 °C and a molal freezing point depression constant Kf=6.75 °C-kg-mol. A solution is prepared by dissolving some urea ((NH₂)2CO) in 450. g of X. This solution freezes at -2.7 °C. Calculate the mass of urea that was dissolved. Round your answer to 2 significant digits.