# How many molecules are there in 6C_6H_12O_6? How do you know?

The big number in the front it called the coefficient, and it indicates the number of molecules of a compound there are in a formula. In this case, the coefficient is 6 and so there are 6 molecules of ${C}_{6} {H}_{12} {O}_{6}$.
The smaller, lower numbers after each element symbol are called subscripts and they indicate how many of each atom are in a single molecule.For example, there are 12 Hydrogen atoms in one molecule of ${C}_{6} {H}_{12} {O}_{6}$ and so there are 48 in $6 {C}_{6} {H}_{12} {O}_{6}$.