Chemical Composition of Fe3(PO4)2

The video tutorial explains how to determine the number of atoms in the compound Fe3(PO4)2, known as iron(II) phosphate. It begins by identifying the elements present: iron, phosphorus, and oxygen. The tutorial then details how to count the atoms of each element, considering subscripts and parentheses in the chemical formula. It further explains how to calculate the number of atoms in one mole of the compound using Avogadro's number. Finally, it discusses the number of phosphate ions present in the compound.

What are the elements present in the compound Fe3(PO4)2?

• Iron, Phosphorus, and Oxygen

• Iron, Sulfur, and Oxygen

• Phosphorus, Oxygen, and Nitrogen

• Iron, Nitrogen, and Sulfur

How many iron atoms are present in the formula Fe3(PO4)2?

• 3

• 4

• 1

• 2

What is the total number of phosphorus atoms in Fe3(PO4)2?

• 3

• 2

• 4

• 1

How many oxygen atoms are there in Fe3(PO4)2?

• 10

• 8

• 6

• 4

What is the total number of atoms in the compound Fe3(PO4)2?

• 12

• 13

• 11

• 10

To find the number of iron atoms in one mole of Fe3(PO4)2, which constant is used?

• Boltzmann's constant

• Planck's constant

• Avogadro's number

• Faraday's constant

How many phosphate ions are present in Fe3(PO4)2?

• 4

• 3

• 2

• 1

What is the charge of the phosphate ion in Fe3(PO4)2?

• 2+

• 3-

• 2-

• 3+

Which of the following is the correct chemical name for Fe3(PO4)2?

• Iron(II) Phosphate

• Iron(III) Sulfate

• Iron(II) Sulfate

• Iron(III) Phosphate