25 g of a compound is added to 500 mL of water if the freezing point of the resulting solution is
0.57 °C what is the molecular weight of the compound assume no molecular disassociation upon
dissolution Kf equals 1.36 °C/m
O 119 g/mol
90 g/mol
0 60 g/mol
238 g/mol

a)   119 g/mol

Explanation:

-We apply the formula for freezing point depression to obtain the molality of the solution:

#We use the molality above to calculate the molar mass:

Hence, the molar mass of the compound is 119 g/mol

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answer:

the reaction is type of combination reaction.

explanation:

on the product side, there are 2 molecules of bonded to fe   which means one atom of fe are combined two molecules of . so, balanced chemical equation becomes :

this reaction follows the reaction type of combination reaction. a combination reaction is defined as chemical reaction in which reactants combines together to form a single product.