Understanding Magnesium Phosphate Composition

The video tutorial explains how to determine the number of atoms in magnesium phosphate (Mg3(PO4)2). It begins by identifying the elements in the compound and their respective subscripts. The tutorial then calculates the total number of atoms in the compound, including magnesium, phosphorus, and oxygen. Additionally, it explains how to find the number of phosphorus atoms in one mole of magnesium phosphate using Avogadro's number. The video concludes with a brief sign-off by Dr. B.

What elements are present in magnesium phosphate (Mg3(PO4)2)?

• Magnesium, Carbon, Oxygen

• Magnesium, Sulfur, Oxygen

• Magnesium, Phosphorus, Oxygen

• Magnesium, Phosphorus, Nitrogen

How many magnesium atoms are present in Mg3(PO4)2?

• 1

• 4

• 2

• 3

What does the subscript '2' outside the parentheses in Mg3(PO4)2 indicate?

• It applies only to phosphorus.

• It applies only to magnesium.

• It applies to both phosphorus and oxygen.

• It applies only to oxygen.

How many total atoms are there in one formula unit of Mg3(PO4)2?

• 12

• 10

• 13

• 11

How many oxygen atoms are present in Mg3(PO4)2?

• 10

• 4

• 8

• 6

To find the number of phosphorus atoms in one mole of Mg3(PO4)2, which constant is used?

• Boltzmann's constant

• Avogadro's number

• Planck's constant

• Faraday's constant

How many phosphorus atoms are there in one mole of Mg3(PO4)2?

• One times Avogadro's number

• Four times Avogadro's number

• Two times Avogadro's number

• Three times Avogadro's number