The formula of a compound of lead (Pb) and sulfur (S) was determined using the method in this module. A sample of Pb was weighed into a crucible and covered with finely powdered S. The crucible was covered and heated to allow the Pb and S to react. Additional heating burned off all unreacted S. The crucible was then cooled and weighed. The following data were collected. (Mole mass of Pb I 207.2 g/mol, S is 32 g/mol) mass of crucible and cover, g 29.889 g mass of crucible, cover and Pb, g 34.025 g mass of crucible, cover, and compound formed, g 34.666 g Calculate the mass of Pb reacted. 2. Calculate the mass of compound that formed. 3. Calculate the mass of S reacted. 4. Calculate the number of moles of Pb and S reacted. 5. Write the empirical formula of the compound
The formula of a compound of lead (Pb) and sulfur (S) was determined using the method in this module. A sample of Pb was weighed into a crucible and covered with finely powdered S. The crucible was covered and heated to allow the Pb and S to react. Additional heating burned off all unreacted S. The crucible was then cooled and weighed. The following data were collected. (Mole mass of Pb I 207.2 g/mol, S is 32 g/mol)
mass of crucible and cover, g 29.889 g
mass of crucible, cover and Pb, g 34.025 g
mass of crucible, cover, and compound formed, g 34.666 g
- Calculate the mass of Pb reacted.
2. Calculate the mass of compound that formed.
3. Calculate the mass of S reacted.
4. Calculate the number of moles of Pb and S reacted.
5. Write the empirical formula of the compound.
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