Atoms in Chemical Compounds

The video tutorial explains how to calculate the total number of atoms in sodium carbonate decahydrate (Na2CO3.10H2O). It breaks down the process into finding the number of atoms in sodium carbonate and the water molecules separately, then adds them together. The tutorial also covers how to calculate the number of atoms in one mole of the compound using Avogadro's number.

What is the chemical formula for sodium carbonate decahydrate?

• Na2CO3.10H2O

• NaCl.10H2O

• NaHCO3

• Na2CO3

How many sodium atoms are present in sodium carbonate?

• Four

• Three

• Two

• One

What is the total number of atoms in one molecule of sodium carbonate?

• Eight

• Five

• Seven

• Six

How many hydrogen atoms are present in one water molecule?

• Four

• Three

• Two

• One

What is the total number of atoms in the 10 water molecules?

• 40

• 50

• 30

• 20

How many total atoms are there in sodium carbonate decahydrate?

• 50

• 36

• 40

• 46

How many oxygen atoms are present in sodium carbonate decahydrate?

• 10

• 13

• 11

• 12

What is Avogadro's number used for?

• Determining volume

• Measuring temperature

• Counting atoms in a mole

• Calculating mass

How many sodium atoms are in one mole of sodium carbonate decahydrate?

• Three times Avogadro's number

• Two times Avogadro's number

• Four times Avogadro's number

• One times Avogadro's number

If you have one mole of sodium carbonate decahydrate, how many carbon atoms would you have?

• One times Avogadro's number

• Two times Avogadro's number

• Three times Avogadro's number

• Four times Avogadro's number