Question

How many atoms of carbon are in 20 molecules of glucose, $C_6{H}_{12}{O}_6$?

Answer 1

Hint: In one molecule of glucose there are 6 atoms of the carbon atom, 12 atoms of hydrogen atoms, and 6 atoms of oxygen atoms. If we multiply one molecule of glucose by 20 then we can get the number of carbon atoms.

Complete step by step answer:
The molecular formula of glucose is $C_6{H}_{12}{O}_6$, so we can see that in one molecule of glucose there are 6 atoms of the carbon atom, 12 atoms of hydrogen atoms, and 6 atoms of oxygen atoms.
20 molecules of glucose mean we have to multiply one molecule of glucose with 20. This can be written as:
$20C_6{H}_{12}{O}_6$
So, the number of carbon atoms in 20 molecules of carbon atoms can be calculated by multiplying 20 with 6. We get:
$20\text{ x 6 = 120}$
Therefore, there are 120 atoms of carbon atoms in 20 molecules of glucose.

Additional Information :
We can also calculate the number of hydrogen and oxygen atoms in the molecule.
So, the number of hydrogen atoms in 20 molecules of glucose can be calculated by multiplying 20 with 12. We get:
$12\text{ x 20 = 240}$
- Therefore, there are 240 atoms of hydrogen atoms in 20 molecules of glucose.
So, the number of oxygen atoms in 20 molecules of glucose can be calculated by multiplying 20 with 6. We get:
$20\text{ x 6 = 120}$
Therefore, there are 120 atoms of oxygen atoms in 20 molecules of glucose.
Hence there are 120 atoms of carbon and oxygen, and 240 atoms of hydrogen in 20 molecules of glucose.

Note: If the question was about the number of atoms in a mole of the question then we have to multiply the number of moles to the Avogadro's number, the value of Avogadro's number is $6.023\text{ x 1}{\text{0}}^{23}$.