# Units in stoichiometry

$$C_x H_y O_z$$

1.What are the units of x,y,z.I've read that they're termed as 'stoichiometric coefficients'.

2.What is the unit of mass proportion of carbon(c) in the fuel?

$$c=\frac{M_{carbon}}{M_{fuel}} .x$$

The indexes $$x, y, z$$ represent quantities of atoms in a compound. So they do not have any units.
@Q2 Do you know what are $$c, M$$ and $$x$$ in the equation? If you do, you can answer your question. If you do not, than you should find it out.
• If we assume that both $M_c$ and $M_f$ have the same units than what you got from the dimensional analysis? Jan 9 '14 at 18:31