Convert Atomic Mass Unit to Kilogram (amu to kg)

In next fields, kindly type your value in the text box under title [ From: ] to convert from atomic mass unit to kilogram (amu to kg). As you type your value, the answer will be automatically calculated and displayed in the text box under title [ To: ].

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Definitions:

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.

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.


How to Convert Atomic Mass Units to Kilograms

Example: How many kilograms are equivalent to 76.8 atomic mass units?


As;

1 atomic mass units = 1.66E-27 kilograms

76.8 atomic mass units = Y kilograms

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

Y equals 76.8 times 1.66E-27 over 1

(i.e.) Y = 76.8 * 1.66E-27 / 1 = 1.27488E-25 kilograms

Answer is: 1.27488E-25 kilograms are equivalent to 76.8 atomic mass units.


Practice Question: Convert the following units into kg:


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

( i ) 36.63 amu

( ii ) 41.12 amu

( iii ) 2.01 amu



References
  • Wikipedia
  • USMA
  • NIST

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