**Definitions:**

**Kilogram** (abbreviations: **kg, or kgm**): is a SI (metric) system unit of mass (IPK, also known as "Le Grand K" or "Big K") and equivalent to 1/1000 of one gram. Where, at the temperature of melting ice, one gram is the absolute weight of a volume equal to the hundredth part of a metre cube of pure water.

**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 Kilograms to Atomic Mass Units

*Example: How many atomic mass units are equivalent to 9.56 kilograms?*

As;

1 kilograms = 6.024E+26 atomic mass units

9.56 kilograms = Y atomic mass units

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

Y equals 9.56 times 6.024E+26 over 1

(i.e.) Y = 9.56 * 6.024E+26 / 1 = 5.758944E+27 atomic mass units

Answer is: 5.758944E+27 atomic mass units are equivalent to 9.56 kilograms.

*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 ) 66.57 kg

( ii ) 73.07 kg

( iii ) 1.68 kg