Iron(II) Chloride and Atomic Mass

Andrew teaches how to find the molecular mass of iron II chloride. The process involves identifying the elements in the compound, counting the number of atoms, and using the periodic table to find the mass of each element. The total molecular mass is calculated by multiplying the number of atoms by the atomic mass and summing the results. The video concludes with a brief sign-off.

What is the first step in finding the molecular mass of a compound?

• Add up the total masses

• Multiply the atomic masses by the number of atoms

• Find the atomic masses

• Write down the elements in the compound

Which elements are present in iron(II) chloride?

• Iron and Oxygen

• Iron and Chlorine

• Iron and Carbon

• Iron and Hydrogen

How many atoms of chlorine are present in iron(II) chloride?

• Three

• One

• Four

• Two

Where can you find the atomic masses of elements?

• In a chemistry textbook

• On the periodic table

• In a dictionary

• On a calculator

What is the atomic mass of iron (Fe)?

• 35.45

• 55.85

• 70.90

• 126.75

What is the atomic mass of chlorine (Cl)?

• 126.75

• 55.85

• 70.90

• 35.45

How do you find the total mass of an element in a compound?

• Add the atomic masses

• Multiply the atomic mass by the number of atoms

• Subtract the atomic masses

• Divide the atomic mass by the number of atoms

What is the total mass of chlorine in iron(II) chloride?

• 126.75

• 35.45

• 70.90

• 55.85

What is the total mass of iron in iron(II) chloride?

• 70.90

• 126.75

• 55.85

• 35.45

What is the molecular mass of iron(II) chloride?

• 35.45

• 55.85

• 70.90

• 126.75