# How many atoms of carbon are in 20 molecules of glucose, C_6H_12O_6?

Jan 30, 2017

One molecule of glucose has 6 atoms, as you can see in carbon's index.( ${C}_{6}$).
In 20 molecules there will be $6 \cdot 20$ carbon atoms.
20 ${C}_{6} {H}_{12} {O}_{6}$
So, written down like this there are $20 \cdot 6$ carbon molecules, $12 \cdot 20$ hydrogen atoms and $6 \cdot 20$ oxygen molecules.