Enough of a monoprotic acid is dissolved in water to produce a 1.82 M solution. The pH of the resulting solution is 2.92 . Calculate the Ka for the acid.

Can someone me with these questions plz.

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer

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?