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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the atomic number of carbon is six, which means that a carbon atom has six protons. carbon has three naturally occurring isotopes: carbon-12, carbon-13, and carbon-14. which of these statements are true about carbon and its isotopes? select all that appl