Calcium Phosphate Chemical Composition

The video tutorial explains how to determine the number of atoms in calcium phosphate (Ca3(PO4)2). It begins by identifying the atoms present: calcium, phosphorus, and oxygen. The tutorial then details how to count the atoms using subscripts and parentheses, resulting in a total of 13 atoms. It further explains how to calculate the number of phosphorus atoms in one mole of calcium phosphate using Avogadro's number. The video concludes with closing remarks from Dr. B.

What are the three types of atoms present in calcium phosphate?

• Calcium, Carbon, Oxygen

• Calcium, Phosphorus, Oxygen

• Calcium, Sulfur, Oxygen

• Calcium, Phosphorus, Nitrogen

How many calcium atoms are present in the formula Ca3(PO4)2?

• One

• Two

• Three

• Four

What is the role of parentheses in the chemical formula Ca3(PO4)2?

• They show the presence of a complex ion.

• They denote the charge of the compound.

• They indicate a multiplication factor for the atoms inside.

• They are used to balance the equation.

How many phosphorus atoms are there in the compound Ca3(PO4)2?

• One

• Two

• Three

• Four

How many oxygen atoms are present in the compound Ca3(PO4)2?

• Six

• Four

• Eight

• Ten

What is the total number of atoms in one formula unit of Ca3(PO4)2?

• 12

• 14

• 11

• 13

How would you calculate the number of phosphorus atoms in one mole of Ca3(PO4)2?

• Add 6.02 x 10^23 to the number of phosphorus atoms

• Divide the number of phosphorus atoms by 6.02 x 10^23

• Subtract 6.02 x 10^23 from the number of phosphorus atoms

• Multiply the number of phosphorus atoms by 6.02 x 10^23