Question

Calculate the Relative molecular mass of the following C2H5O4​

Answer 1

We are asked to calculate the relative molecular mass of the following:

a. ${\sf{C_2H_5O_4}}$

• The atomic mass of C = 12u

• The atomic mass of H = 1u

• The atomic mass of O = 16u

_____________________

• The atomic mass of ${\sf{C_2}}$ is 12u × 2 = 24u

• The atomic mass of ${\sf{H_5}}$ is 1u × 5 = 5u

• The atomic mass of ${\sf{O_4}}$ is 16u × 4 = 64u

_____________________

Molecular mass = The molecular mass of any substance is the sum of the atomic masses of all the atoms in the molecule of the substance!

→ Molecular mass = 24u + 5u + 64u

→ Molecular mass = 29u + 64u

→ Molecular mass = 93u