Molar Mass Calculations for PbI2

The video tutorial explains how to calculate the molar mass of lead(II) iodide (PbI2). It begins by identifying the atomic masses of lead and iodine from the periodic table. The tutorial then demonstrates how to calculate the total molar mass by adding the contributions of lead and two iodine atoms. The final molar mass is presented, with a note on possible variations due to decimal precision. The video concludes with a brief thank you from Dr. B.

What is the molar mass of lead (Pb) used in the calculation of PbI2?

• 126.90 grams per mole

• 207.2 grams per mole

• 200.0 grams per mole

• 461.00 grams per mole

How many iodine atoms are considered in the calculation of PbI2's molar mass?

• One

• Two

• Three

• Four

What is the molar mass of iodine (I) used in the calculation?

• 207.2 grams per mole

• 100.0 grams per mole

• 126.90 grams per mole

• 461.00 grams per mole

What is the total molar mass of PbI2 as calculated in the video?

• 461.00 grams per mole

• 126.90 grams per mole

• 500.0 grams per mole

• 207.2 grams per mole

Why might the calculated molar mass of PbI2 slightly differ when using more decimal points?

• Due to rounding errors

• Because of incorrect atomic weights

• Due to incorrect chemical formula

• Because of measurement errors