Chemical Composition and Hydrates

This video tutorial explains how to find the number of atoms in magnesium sulfate heptahydrate (MgSO4·7H2O). It begins by introducing the compound and its components, then proceeds to count the atoms in magnesium sulfate and the water molecules separately. Finally, it calculates the total number of atoms in the compound, providing a clear and concise explanation of the process.

What is the chemical formula for magnesium sulfate heptahydrate?

• MgSO4·5H2O

• MgSO4·7H2O

• MgSO4·6H2O

• MgSO4·8H2O

How many magnesium atoms are present in MgSO4?

• Two

• Four

• One

• Three

In the compound MgSO4, how many oxygen atoms are there?

• Two

• Three

• Four

• Five

How many hydrogen atoms are present in one water molecule (H2O)?

• Two

• Four

• Three

• One

What is the total number of atoms in the seven water molecules in MgSO4·7H2O?

• 27

• 21

• 18

• 24

What does the prefix 'hepta' in heptahydrate indicate?

• Five

• Six

• Eight

• Seven

What is the total number of atoms in MgSO4·7H2O?

• 33

• 30

• 27

• 24