**Definitions:**

**Pound** (abbreviations: **lb, or lbs, or ps**): is a unit of force used in some systems of measurement including English Engineering units and the British Gravitational System. Also, it is a unit of mass used in the imperial, United States customary and other systems of measurement.

**Atomic Mass Unit** (abbreviations: **amu, or u**): also known as dalton (symbol: Da), is a standard unit of mass that used on an atomic or molecular scale (atomic mass). One unified atomic mass unit is about the mass of one nucleon (either a single proton or neutron) and equivalent to 1 g/mol.

## How to Convert Pounds to Atomic Mass Units

*Example: How many atomic mass units are equivalent to 72.23 pounds?*

As;

1 pounds = 2.732E+26 atomic mass units

72.23 pounds = Y atomic mass units

Assuming Y is the answer, and by criss-cross principle;

Y equals 72.23 times 2.732E+26 over 1

(i.e.) Y = 72.23 * 2.732E+26 / 1 = 1.9733236E+28 atomic mass units

Answer is: 1.9733236E+28 atomic mass units are equivalent to 72.23 pounds.

*Practice Question: Convert the following units into amu:*

N.B.: After working out the answer to each of the next questions, click adjacent button to see the correct answer.

( i ) 20.64 lb

( ii ) 70.42 lb

( iii ) 32.3 lb