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What is the freezing point in the given solutions

What is the freezing point in (C) the solutions below? For water, Kf=1.86 (Ckg)/mol. The vapor pressure of water at 45.0 C is 71.93mm Hg.

1. A solution of 12.5 g of urea, CH4N2O, in 135 g of water at 45 C.

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## Q : Gven datamoles of h20001mole given weight of the unknown

Given data:moles of H2=0.001mole , given weight of the unknown metal(M)=0.0757 g given equation:M(s)+nH30^+1........>M^(+n)+ (n/2) H2 + nH2O from the stoichiometry of the reaction and the number of moles of H2 given, Calculate the number of mol