GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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less than
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equal to
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greater than
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sometimes the same as
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Detailed explanation-1: -This is the theoretical atomic mass of the Carbon-12 isotope (6 protons and 6 neutrons). This means that the atomic mass or atomic weight (12 grams) of carbon is equal to exactly 1 mole of carbon. Lithium for instance has an atomic mass of 6.941 grams and this is equal to one mole of lithium.
Detailed explanation-2: -One mole of a substance is equal to 6.022 × 10²³ units of that substance (such as atoms, molecules, or ions). The number 6.022 × 10²³ is known as Avogadro’s number or Avogadro’s constant.
Detailed explanation-3: -Originally, a mole was the quantity of anything that has the same number of particles found in 12.000 grams of carbon-12. That number of particles is Avogadro’s Number, which is roughly 6.02x1023. A mole of carbon atoms is 6.02x1023 carbon atoms.
Detailed explanation-4: -Example: Carbon (atomic mass = 12.01)-1 mole of Carbon weighs 12.01 grams. This means that 6.022x1023 carbon atoms (or molecules) weights 12.01 grams.
Detailed explanation-5: -The value of the mole is equal to the number of atoms in exactly 12 grams of pure carbon-12. 12.00 g C-12 = 1 mol C-12 atoms = 6.022 × 1023 atoms • The number of particles in 1 mole is called Avogadro’s Number (6.0221421 x 1023).