Chemical Composition of Zn3(PO4)2

The video tutorial explains how to determine the number of atoms in the compound zinc phosphate, Zn3(PO4)2. It begins by identifying the individual atoms present: zinc, phosphorus, and oxygen. The tutorial then demonstrates how to count these atoms using subscripts and parentheses, resulting in 3 zinc, 2 phosphorus, and 8 oxygen atoms, totaling 13 atoms in the compound. Additionally, it covers how to calculate the number of phosphorus atoms in one mole of zinc phosphate by multiplying by Avogadro's number. The video concludes with a brief summary and thanks to the viewers.

Which atoms are present in the compound Zn3(PO4)2?

• Zinc, Sulfur, and Oxygen

• Zinc, Phosphorus, and Nitrogen

• Zinc, Carbon, and Oxygen

• Zinc, Phosphorus, and Oxygen

What does the subscript '3' indicate in Zn3(PO4)2?

• There are three phosphorus atoms

• There are three zinc atoms

• There are three molecules of zinc phosphate

• There are three oxygen atoms

How many phosphorus atoms are present in Zn3(PO4)2?

• One

• Two

• Three

• Four

How many oxygen atoms are present in Zn3(PO4)2?

• Six

• Ten

• Four

• Eight

In the context of Zn3(PO4)2, what does the subscript '2' outside the parentheses indicate?

• It applies to the phosphorus atoms only

• It applies to the zinc atoms only

• It applies to the entire compound

• It applies to both phosphorus and oxygen atoms

What is the total number of atoms in Zn3(PO4)2?

• 14

• 13

• 12

• 11

How do you calculate the number of phosphorus atoms in one mole of Zn3(PO4)2?

• Subtract Avogadro's number from the number of phosphorus atoms

• Add Avogadro's number to the number of phosphorus atoms

• Divide the number of phosphorus atoms by Avogadro's number

• Multiply the number of phosphorus atoms by Avogadro's number

What is Avogadro's number used for in chemistry?

• To calculate the mass of a compound

• To measure the density of a liquid

• To determine the number of atoms in a mole

• To find the volume of a gas