Empirical Formula - Faculty web pages - SUNY Plattsburgh

Sample Data SheetMass of crucible and magnesiumMass of crucibleMass of magnesiumMass of crucible and magnesium-oxygen compoundMass of magnesium-oxygen compoundMass of oxygenEmpirical Formula___________ ______________________ ______________________ ______________________ ______________________ ______________________ ______________________ ___________Post Lab Questions1.) For each of the following procedural errors indicate whether the mass of the compoundwould have been too big or too small. Explain your answer.a.) A student forgot to put the cover on the crucible, when it was heated some of the contentscame flying out of the crucible.b.) A student closed the air vent all the way on the Bunsen burner, creating a dirty yellowflame which deposited soot on the crucible.2.) Determine the empirical formula of calcium phosphide which is comprised of 66.00 %calcium and 34.00 % phosphorous.3.) Glucose has a molar mass of 180.1 g/mol and is comprised of 40.0 % carbon, 6.72 %hydrogen, and 53.3 % oxygen. Determine the molecular formula of glucose.4.) Determine the molecular formula of octane, which has a molar mass of 114.26 g/mol. A245 g sample contains 206.0 g of carbon, the remainder is hydrogen.Pre Lab Questions1.) Why is water added to the reaction mixture towards the end of the procedure?2.) What should you use to extinguish a magnesium fire?3.) A student determined that the mass of a magnesium ribbon was 0.380 g, how many moles isthis?4.) Determine the number of magnesium atoms in the 0.380 g ribbon.5.) Determine the mass of 3.25 X 10 22 oxygen atoms.