[dexangeles]

check your givens and write them down

2.97 grams of chlorophyll

900 g/mol chlorophyll

24.31 g/mol of magnesium

percent of magnesium


as far as i remember, you can either use percent calculation or follow stoichiometry

[sundrops]

thanks for everyones input - i finally figured it out!    (finally!) ouch - my head really hurts now...