Mass and Structure of Oxygen

This video tutorial explains how to calculate the mass of an individual oxygen atom and an oxygen molecule. It begins with an introduction to the periodic table, focusing on atomic numbers and molar mass. The tutorial then demonstrates the calculation of the mass of a single oxygen atom using Avogadro's number. Finally, it covers the calculation of the mass of an oxygen molecule, highlighting the relationship between atomic and molecular mass.

What is the main focus of this session?

• Calculating the mass of a hydrogen atom

• Understanding the structure of the periodic table

• Calculating the mass of an oxygen atom and molecule

• Learning about chemical reactions

What does the atomic number of an element represent?

• The number of electrons in an atom

• The number of protons in the nucleus

• The total mass of the atom

• The number of neutrons in the nucleus

What is the molar mass of carbon?

• 12.011 grams

• 6.022 grams

• 83.80 grams

• 15.999 grams

How many atoms are there in one mole?

• 15.999 x 10^23

• 1.022 x 10^23

• 6.022 x 10^23

• 12.011 x 10^23

What is the molar mass of neon?

• 15.999 grams

• 83.80 grams

• 28.086 grams

• 20.10 grams

How do you calculate the mass of an individual oxygen atom?

• Divide the molar mass by Avogadro's number

• Add the atomic number to the molar mass

• Subtract the atomic number from the molar mass

• Multiply the molar mass by Avogadro's number

What is the mass of an individual oxygen atom?

• 2.66 x 10^-23 grams

• 31.98 grams

• 15.99 grams

• 5.31 x 10^-23 grams

What is the molecular structure of O2?

• Two oxygen atoms with a single covalent bond

• Two oxygen atoms with no bonds

• Two oxygen atoms with a double covalent bond

• One oxygen atom with two lone pairs

What is the mass of one mole of O2 molecules?

• 5.31 x 10^-23 grams

• 15.99 grams

• 31.98 grams

• 2.66 x 10^-23 grams

How does the mass of an oxygen molecule compare to an oxygen atom?

• It is half the mass

• It is the same mass

• It is triple the mass

• It is double the mass