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 56.69 atomic mass units?
As;
1 atomic mass units = 1.66E-27 kilograms
56.69 atomic mass units = Y kilograms
Assuming Y is the answer, and by criss-cross principle;
Y equals 56.69 times 1.66E-27 over 1
(i.e.) Y = 56.69 * 1.66E-27 / 1 = 9.41054E-26 kilograms
Answer is: 9.41054E-26 kilograms are equivalent to 56.69 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 ) 11 amu
( ii ) 46.37 amu
( iii ) 86.33 amu
