Atoms in Calcium Bromide

The video tutorial explains how to determine the number of atoms in calcium bromide (CaBr2). It begins by identifying the elements in CaBr2, noting that there is one calcium atom and two bromine atoms, totaling three atoms. The tutorial then explains how to calculate the number of atoms in one mole of calcium bromide using Avogadro's number. For calcium, the number of atoms is multiplied by Avogadro's number, and the same is done for bromine, considering there are two bromine atoms. The video concludes with a brief summary.

What is the total number of atoms present in a single molecule of calcium bromide (CaBr2)?

• 3

• 2

• 4

• 1

How many calcium atoms are there in one molecule of CaBr2?

• 2

• 0

• 3

• 1

To find the number of calcium atoms in one mole of calcium bromide, which constant is used?

• Boltzmann's constant

• Planck's constant

• Avogadro's number

• Gravitational constant

If you have one mole of CaBr2, how many moles of calcium atoms do you have?

• 0.5 moles

• 1 mole

• 2 moles

• 3 moles

How many bromine atoms are present in one mole of CaBr2?

• 4 moles

• 3 moles

• 2 moles

• 1 mole

What is the role of Avogadro's number in determining the number of atoms in a mole of a substance?

• It determines the volume of atoms.

• It counts the number of atoms.

• It measures the mass of atoms.

• It calculates the energy of atoms.