Question

explain molecular mass of C2H5OH

Answer 1

Molecular mass is 12×2+6+16
=24+22
=46

Answer 2

Molecular mass of $C_2H_5OH$

Explanation:

• The sum of the atomic mass of each number of atoms present in the compound is called its molecular mass.
• In order to calculate the molecular mass of the compound the following must be identified:

1. Constituents
2. Atoms of constituents
3. Molar mass of constituents

• Accordingly in the case of $C_2H_5OH$:

1. The constituents are Carbon (C), Hydrogen (H), and oxygen (O).
2. It is composed of 2 atoms of C, 6 atoms of H and 1 atom of O.
3. Molar mass of carbon, hydrogen and oxygen are 12, 1, and 16 respectively.

• With the help of the obtained data, the molecular mass of $C_2H_5OH$ can be calculated.

∴  Molecular mass of $C_2H_5OH$ = 2(C)+5(H)+1(O)+1(H)

Molecular mass of $C_2H_5OH$ = 2(12)+5(1)+1(16)+1(1)

Molecular mass of $C_2H_5OH$ = 24+5+16+1

Molecular mass of $C_2H_5OH$ =46g

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