A Pure Solvent Freezes at 43

question 9

Multiple Choice

A pure solvent freezes at 43.4?0°C.The freezing temperature is 40.7°C when 17.5 g of CO(NH₂) ₂ is dissolved in 1.00* 10² g of the solvent.Calculate the molal freezing point constant of the solvent.

• A)0.027 °C/m
• B)0.343 °C/m
• C)0.93 °C/m
• D)13.9 °C/m
• E)14.9 °C/m

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Definitions:

Coefficient Of Determination

A statistical metric, typically denoted as R², that measures the proportion of the variance for a dependent variable that's predicted from the independent variable(s) in a regression model.

SSE

Sum of Squared Errors, a measure used in statistical analysis to quantify the discrepancy between the data and an estimation model.

SST

Total sum of squares in statistical analysis, measuring the total variation in the observed data.

Least Squares Estimate

A method in statistics for estimating the best-fitting line through a set of points by minimizing the sum of the squares of the differences between observed and estimated values.