Converting Grams of Lead to Atoms

The video tutorial explains how to convert grams of lead to atoms. It starts by introducing the need to convert grams to moles using the molar mass of lead, which is found on the periodic table. Once moles are calculated, Avogadro's number is used to convert moles to atoms. The process is demonstrated with an example of 217.4 grams of lead, resulting in 6.6 x 10^23 atoms. The tutorial concludes by generalizing the conversion process for any substance.

Why can't we directly convert grams to atoms?

• Because atoms are too small to measure directly.

• Because we need to convert grams to moles first.

• Because grams and atoms are different units.

• Because atoms are not present in grams.

What is the first step in converting grams of lead to atoms?

• Find the atomic number of lead.

• Multiply by Avogadro's number.

• Add the atomic mass to the grams.

• Divide by the molar mass to get moles.

What is the atomic mass of lead used in the conversion?

• 207.2 grams per mole

• 200.0 grams per mole

• 210.5 grams per mole

• 205.3 grams per mole

How many moles of lead are obtained from 217.4 grams?

• 0.9 moles

• 3.2 moles

• 1.1 moles

• 2.1 moles

What number is used to convert moles to atoms?

• Planck's constant

• Avogadro's number

• Boltzmann's constant

• Euler's number

What happens to the units when converting moles to atoms?

• They cancel out, leaving atoms.

• They change from moles to grams.

• They convert to molecules.

• They remain the same.

How many atoms are in 1.1 moles of lead?

• 5.5 x 10^23 atoms

• 2.2 x 10^23 atoms

• 1.1 x 10^23 atoms

• 6.6 x 10^23 atoms

What is the final result of converting 217.4 grams of lead to atoms?

• 6.6 x 10^23 atoms

• 1.1 x 10^24 atoms

• 3.3 x 10^23 atoms

• 2.2 x 10^24 atoms

What is the general process for converting grams to atoms?

• Multiply grams by atomic mass, then by Avogadro's number.

• Divide grams by molar mass, then multiply by Avogadro's number.

• Add grams to atomic mass, then divide by Avogadro's number.

• Subtract atomic mass from grams, then multiply by Avogadro's number.