Question

Write the formulae and molecular mass of Ethanol.

Answer 1

Formula:

It is a symbolic representation of a molecule or an atom.

Molecular mass:

• Molecular mass is the sum of the atomic masses of all atoms in the molecule.
• Each atom has different atomic masses.

Ethanol:

• The chemical formula for ethanol is ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}$
• The molecular mass of ethanol is $(2\mathrm{x}12)+\left(5\mathrm{x}1\right)+16+1=46\mathrm{u}$.