19. Explain fow the colioction of 159.7g of Fos.0y trom the concurtion of 48 in fef 9 of hremoglobin can be usad to chiterrem the molw meess of fremoglobin. Giofer the quistion looks sumder to Alo prior question, fot errt ariking tivo samo thing) 20. Sugpose the errpincal fonenuls you whote is incontect ty one topopon acm : Show that WH. Then, commod on how acaribe a tekince acoils thwe so be in criser and the allowed percont enror to colost that changa) 20. Suppose the empirical formula you wrote is incorrect by one hydrogen atom. Show that a laboratory measurement might not be able to determine that the formula is incorrect by one hydrogen atom. (Hint: add one hydrogen to the empirical formula and determine the %H. Then, comment on how accurate a balance would have to be in order and the allowed percent error to detect that change.) 21. Estimate how many hemoglobin molecules are present in your body and calculate the number of moles of hemoglobin present. (This takes a few steps to estimate think total volume of blood, \%hemoglobin in blood to mL or g of hemoglobin, then grams-to-moles)