Convert petagram [Pg] to Atomic mass unit [u] Online | Free weight-and-mass Converter

Petagram [Pg]

The petagram is a unit of mass in the metric system, used to measure very large quantities.

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  1 petagram = 10¹⁵ grams

  
  
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  1 petagram = 1,000,000,000,000 kilograms (1 trillion kilograms)

  
  
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  Symbol: Pg

  
  

Key Facts:

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  Commonly used in environmental science, such as measuring global carbon emissions or biomass

  
  
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  Much larger than everyday units like kilograms or metric tons

  
  
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  Part of the SI system using the prefix "peta-" meaning $10^{15}$

  
  

The petagram is useful for quantifying massive amounts of material, especially in global-scale scientific studies.

Atomic Mass Unit [u]

The atomic mass unit (u), also known as the unified atomic mass unit or dalton (Da), is a standard unit of mass used to express atomic and molecular weights.

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  1 u = 1/12 the mass of a carbon-12 atom

  
  
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  1 u ≈ 1.66053906660 × 10⁻²⁷ kilograms

  
  
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  Symbol: u or Da

  
  

Key Facts:

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  Used to measure the mass of atoms, molecules, and subatomic particles

  
  
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  1 hydrogen atom ≈ 1 u

  
  
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  Mass of a proton ≈ 1.007 u, neutron ≈ 1.008 u

  
  
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  Simplifies comparison of atomic-scale masses in chemistry and physics

  
  

The atomic mass unit provides a convenient and consistent way to express and compare very small masses at the atomic and molecular scale.