mole

• Mole


  A unit for counting entities at the microscopic level (e.g. atoms, molecules, particles)
• One mole


  The amount of a substance that contains as many particles or entities as there are atoms in exactly 12 g (or 0.012 kg) of the 12C isotope
• The mole of a substance always contain the same number of entities, no matter what the substance may be
• The number of atoms in one mole of carbon-12 is 6.0221367 x 10^23
• Avogadro constant


  The number of particles in one mole, denoted as N
• 1 mole = 6.022 x 10^23 particles
• Molar mass


  The mass of one mole of a substance in grams
• Molar mass in grams is numerically equal to atomic, molecular or formula mass in u
• Molar mass of


  • Ammonia = 17.0 g
  • Sodium chloride = 58.5 g
  • Sodium = 23.0 g
• The number of entities (atoms or molecules) contained in molar mass is equal to 6.022 * 10^23
• Gram atomic mass


  The mass in grams of one mole of an element
• To calculate number of moles (n)

  Mass of substance in grams / Molar mass of the substance
• 1.mol means any substance (like hydrogen or oxygen ) that contains 6.022*10^23of any atom or molecule or compound any substance. this is used
• 2. but molar mass means the mass of the quantitative tool MOL because 1 mol of hydrogen contains a different mass compared to 1 mol of chlorine. so to measure the mass of different substance of mole is called MOLAR MASS
• atomic mass means mass in unit U

  mass of atom in gram means mass in unit gram G

  to convert amu to g

  mass in u / 1mole (avagardo number)