Atoms in Na2S and Avogadro's Number

The video tutorial explains how to determine the number of atoms in sodium sulfide (Na2S). It begins by identifying the elements in Na2S, sodium and sulfur, and counts the atoms based on subscripts. The tutorial then explains how to calculate the number of atoms in one mole of Na2S using Avogadro's number, providing examples for both sodium and sulfur atoms. The video concludes with a brief thank you from Dr. B.

What is the total number of atoms present in a single molecule of Na2S?

• Five

• Two

• Three

• Four

How many sodium atoms are there in one molecule of Na2S?

• One

• Two

• Three

• Four

To find the number of sodium atoms in one mole of Na2S, which number should you multiply by Avogadro's number?

• Four

• Three

• Two

• One

What is Avogadro's number?

• 6.02 x 10^22

• 6.02 x 10^23

• 6.02 x 10^25

• 6.02 x 10^24

How many sulfur atoms are there in one mole of Na2S?

• 6.02 x 10^22

• 6.02 x 10^23

• 6.02 x 10^24

• 6.02 x 10^25

If you have one mole of Na2S, how many total atoms do you have?

• 1.806 x 10^26

• 1.806 x 10^24

• 1.806 x 10^25

• 1.806 x 10^23