1. Is sulfur dioxide an atom, molecule, or formula unit ? 2. Is potassium an atom, molecule, or formula unit?

Enough of a monoprotic weak acid is dissolved in water to produce a 0.0172 m solution. if the ph of the resulting solution is 2.39 at 20 °c, determine the pka for the acid.

Mike and mitchell decide to have a foot race. they mark off a stretch of 100 yards, and recruit cindy to work the stopwatch. after running the race and looking at the results, cindy declared that mitchell was the fastest. so how did the boys times compare?

What substance has a mass of 9.5g and volume of 2.1cm^3