In the lab you measure a clean dry crucible and cover to be 24.36 grams. you obtain a 2cm piece of pure magnesium metal. after sand papering the magnesium you place it in into your crucible and the mass of crucible, cover and magnesium masses out to be 24.66 grams. you observe that the magnesium is gray and shiny. you heat the crucible gently at first then vigorous for 10 minutes until the magnesium ignites. after the crucible cools you add a few drops of distilled water and heat again. the mass of the magnesium compound, crucible, and cover masses out to be 24.85 grams.
what is the empirical formula of the compound? show all work and units.
1) mass of the mg
2) mass of the mgo
3) mass of 0
4) moles of mg & moles of o
5) show mole to mole mgxoy
6) empricial formula of compound
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