Does 'molar mass' include an atomic weight for single atom?

  • Thread starter HCverma
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  • #1
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Main Question or Discussion Point

Does molar mass include an atomic weight for single atom and molecular weight for molecules?
 

Answers and Replies

  • #2
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I do not understand your question. Molar mass simply represent the mass of one mole of entities. These entities could be anything: atoms, molecules, whatever...
 
  • #3
82
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I do not understand your question. Molar mass simply represent the mass of one mole of entities. These entities could be anything: atoms, molecules, whatever...
I got my answer. Thanks a lot.
 
  • #4
32
1
For example: mass of water is given and amounts to 18 g. Calculate the number of moles for water molecules, and calculate the number of moles for hydrogen atoms.
Answer:
m (H2O) = 18 g
n (H2O) = ?
n (H) = ?
-------------------------------------

n (H2O) = m (H2O) / M(H2O) = 18 g / 18 g mol-1 = 1 mol

n (H) = m (H) / M(H) = 2 g / 1 g mol-1 = 2 mol

So, the answer is: 18 g of water contain 1 mol of water and 2 moles of hydrogen.
 

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