Question

MCQ : 6.4 g of oxygen is equivalent to

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Answer

Question

6.4 g of oxygen is equivalent to

  1. 0.4 mol of oxygen atoms
  2. 0.4 mol of oxygen molecules
  3. 0.2 mol of oxygen atoms
  4. none of these

Answer

0.4 mol of Oxygen atoms

Explanation

If the 6.4 g corresponds to O atoms, then the number of moles of O atoms is:

n = m/M = 6.4 g / 16 g/mol = 0.4 mol

Therefore, 6.4 g of O is equivalent to 0.4 mol of O atoms.

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