What ions would be produced when 1 mol of Al2(Cr2O7)3 is dissolved in water, assuming it is soluble?

How many pi (π) bonds are present in the molecule below?

In which case does a dashed line correctly indicate a hydrogen bond between adjacent molecules?    

Consider the compound etherium (II) bromate, Em(BrO3)2, where etherium, Em, is a made up element with a molar mass of g/mol. What is the mass percent of etherium in this compound? Note: Do NOT enter the % symbol in your answer.

Which of these statements is false regarding properties of atomic orbitals?

Consider the reaction provided below. If you started the reaction with 3.14 g of calcium oxide and g of water, how many grams of calcium hydroxide do you expect to produce, assuming 100% efficiency? You can use the following molar masses: CaO = 56.08 g/mol H2O = 18.02 g/mol Ca(OH)2 = 74.10 g/mol Note: Do NOT include any unit symbols in your answer.

Which of these statements is false regarding properties of atomic orbitals?

Which of the following statements best describes how the freezing points of C2H6 and C10H10 compare?

Which of the following neutral elements requires the most amount of energy to form a +1 cation?

How does the electron configuration change when a neutral iron atom becomes the Fe3+ cation?