Mole Concept and Atomic Mass in Chemistry

This video tutorial explores problems related to the mole concept. It begins with an introduction to the topic, followed by a detailed solution to finding the mass of one atom of carbon using Avogadro's number. The second problem compares the number of atoms in 100 grams of sodium and iron, demonstrating the calculation of atoms per gram and the total number of atoms in a given mass. The video concludes with a summary and encouragement for viewers to solve similar problems.

What is the mass of one mole of carbon in grams?

• 6 grams

• 18 grams

• 12 grams

• 24 grams

How many atoms are there in one mole of carbon?

• 9.033 x 10^23

• 1.204 x 10^24

• 6.022 x 10^23

• 3.011 x 10^23

What is the mass of one atom of carbon in grams?

• 1.993 x 10^-24

• 2.993 x 10^-24

• 1.993 x 10^-23

• 2.993 x 10^-23

What is the mass of one mole of sodium?

• 56 grams

• 11.5 grams

• 46 grams

• 23 grams

How many atoms are there in 100 grams of sodium?

• 2.618 x 10^24

• 1.075 x 10^24

• 3.618 x 10^24

• 4.075 x 10^24

What is the mass of one mole of iron?

• 23 grams

• 56 grams

• 12 grams

• 100 grams

How many atoms are there in 100 grams of iron?

• 4.618 x 10^24

• 3.075 x 10^24

• 2.618 x 10^24

• 1.075 x 10^24

Which element has more atoms in 100 grams, sodium or iron?

• Cannot be determined

• Sodium

• Both have the same

• Iron

What is Avogadro's number?

• 9.033 x 10^23

• 1.204 x 10^24

• 6.022 x 10^23

• 3.011 x 10^23

Why does 100 grams of sodium have more atoms than 100 grams of iron?

• Sodium has a higher atomic mass

• Iron has a higher atomic mass

• Sodium atoms are larger

• Iron atoms are larger