Assuming complete dissociation of the solute, how many grams of kno3 must be added to 275 ml of water to produce a solution that freezes at −14.5 ∘c? the freezing point for pure water is 0.0 ∘c and kf is equal to 1.86 ∘c/m answer=109 g part b needed: if the 3.90 m solution from part a boils at 103.45 ∘c, what is the actual value of the van't hoff factor, i? the boiling point of pure water is 100.00 ∘c and kb is equal to 0.512 ∘c/m.

Identify one disadvantage to each of the following models of electron configuration: -dot structures -arrow and line diagrams -written electron configurations type in your answer below. (answer) -dot structures do not show the distribution of electrons in orbitals and take up a lot of space. -arrow and line diagrams take up a lot of space and make it difficult to count electrons. -written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.

Why is the melting of ice a physical change ?

Ab c or d ? i’m not sure what the answer is