Propylene glycol is an alternate antifreeze that is safely used in vet medicine. Analysis shows that it contains 47.32% carbon, 10.62% hydrogen and 42.06% oxygen. What is the simplest formula for this compound? HINT: % to mass, mass to moles, divide by smallest, multiply till whole.

Which of these elements is not in the family or group indicated?

Give the number of electrons that are needed to fill a 4f subshell.

The more precisely the position is known the less precisely the momentum of the electron is known. Which of these is the designation for the above statement?

Which of these has unpaired electrons on the central atom?

Based on Coulombic forces of attraction, which of these would be expected to be the hardest to dissolve and have the highest melting point?  Apply Coulomb’s law based on the charges of the ions. Consider lattice energies. Ignore the sizes of the ions.

Which of these elements is not in the family or group indicated?

Based on Coulombic forces of attraction, which of these would be expected to be the hardest to dissolve and have the highest melting point?  Apply Coulomb’s law based on the charges of the ions. Consider lattice energies. Ignore the sizes of the ions.

Metals react with oxygen to give oxides with the general formula MxOy. Write a balanced chemical equation for the reaction of iron with oxygen to yield iron(III) oxide.

Metals react with oxygen to give oxides with the general formula MxOy. Write a balanced chemical equation for the reaction of iron with oxygen to yield iron(III) oxide.