A student is trying to determine the identity of an unknown solute by measuring how much of it will dissolve in water at different temperatures. Based on the solubility curve graph and the results of the experiment shown in the data table above, what is most likely the identity of the unknown solute? A. NaClO3

B. KNO3

C. KBr

D. NaCl

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.

Marcel just purchased 1.69 grams of iron fillings in order to make living putty for his 6 year old niece. how many moles of iron are made in his sample?

What is the molar mass of the anhydrous compound? answer using four significant figures. 36.02 g/mol 120.15 g/mol 156.12 g/mol