Understanding Calcium Carbonate Composition

The video tutorial explains how to determine the number of atoms in calcium carbonate (CaCO3). It begins by identifying the individual atoms in the compound: calcium, carbon, and oxygen. The tutorial then explains how to count these atoms, noting that there is one calcium atom, one carbon atom, and three oxygen atoms, totaling five atoms in a molecule of CaCO3. The video further explores how to calculate the number of oxygen atoms in one mole of calcium carbonate using Avogadro's number, resulting in 18.06 x 10^23 oxygen atoms. Similarly, it calculates the number of carbon atoms in one mole as 6.02 x 10^23. The tutorial concludes with a brief summary by Dr. B.

What are the constituent atoms of calcium carbonate?

• Carbon, Hydrogen, Nitrogen

• Calcium, Hydrogen, Oxygen

• Calcium, Carbon, Oxygen

• Sodium, Carbon, Oxygen

How many calcium atoms are present in a single molecule of CaCO3?

• Four

• Three

• Two

• One

What is the total number of atoms in a single molecule of calcium carbonate?

• Seven

• Eight

• Six

• Five

What is the significance of the subscript '3' in CaCO3?

• It indicates there are three oxygen atoms.

• It shows there are three calcium atoms.

• It represents three molecules of CaCO3.

• It means there are three carbon atoms.

How many oxygen atoms are there in one mole of calcium carbonate?

• 24.08 x 10^23

• 12.04 x 10^23

• 6.02 x 10^23

• 18.06 x 10^23

What is Avogadro's number used for in the context of this video?

• To calculate the number of atoms in a mole

• To determine the mass of a molecule

• To find the volume of a gas

• To measure the density of a substance

How many carbon atoms are in one mole of calcium carbonate?

• 12.04 x 10^23

• 24.08 x 10^23

• 18.06 x 10^23

• 6.02 x 10^23