Question

A certain substance X has a normal freezing point of 1.2°C and a molal freezing point...

A certain substance

X

has a normal freezing point of

1.2°C

and a molal freezing point depression constant

=Kf1.51·°C·kgmol−1

. A solution is prepared by dissolving some urea

NH22CO

in

950.g

of

X

. This solution freezes at

−1.8°C

. Calculate the mass of urea that was dissolved.

Round your answer to

2

significant digits

0 0
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