Atoms in Chemical Compounds

The video tutorial explains how to determine the number of atoms in the chemical compound Lead(II) Phosphate, represented as Pb3(PO4)2. It begins by identifying the elements present in the compound and their respective subscripts. The tutorial then demonstrates how to calculate the total number of atoms by considering the subscripts and the multiplication of elements within parentheses. Finally, it covers how to find the number of specific atoms, such as phosphorus, in one mole of the compound using Avogadro's number.

What is the subscript for lead in the compound Pb3(PO4)2?

• 4

• 3

• 2

• 1

How many phosphorus atoms are present in Pb3(PO4)2?

• 3

• 2

• 4

• 1

What is the total number of oxygen atoms in Pb3(PO4)2?

• 4

• 8

• 10

• 6

How many total atoms are there in the compound Pb3(PO4)2?

• 10

• 11

• 12

• 13

To find the number of phosphorus atoms in one mole of Pb3(PO4)2, you multiply the number of atoms by which constant?

• Planck's constant

• Avogadro's number

• Boltzmann's constant

• Faraday's constant

What is the result of multiplying the number of phosphorus atoms in Pb3(PO4)2 by Avogadro's number?

• The number of lead atoms in one mole

• The number of oxygen atoms in one mole

• The number of phosphorus atoms in one mole

• The total number of atoms in one mole