Which electron box diagram below represents an oxygen atom that has absorbed a photon of light?

What process accompanies the transition of a hydrogen electron from n=5 to n=3?

What volume (in mL) of a 0.827 M KOH solution is required to neutralize 35.00 mL of 0.737 M H2SO4? (Hint: You’ll want to start by writing a balanced equation for the process)

Molecular level views of three aqueous solutions (A, B, and C) are shown below (H2O molecules have been omitted for clarity, and because I’m lazy…): Which of these solutions could represent a weak acid?

What is the concentration (M) of an aqueous solution of methanol when 0.200 L of a 2.00 M solution is diluted to 0.800 L?

The value of ∆Hº for the reaction below is +128.1 kJ: CH3OH (l) 

One method for removal of metal ions from a solution is to convert the metal to its elemental form so it can be filtered out as a solid. Which metal can be used to remove aluminum ions from solution?

In a titration of 70.00 mL of 0.737 M H2SO4, what volume of a 0.827 M KOH solution is required for neutralization? (Hint: you’ll want to start by writing a balanced equation for the process)

What is the probability that two or three of the nursing homes received five stars? 

What is the ground state electron configuration for the S3- anion?