Question

MCQ : A sample contains m g of a compound X (Mx = molar mass). The sample contains n mol of x

  • Mole Concept
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Answer

Question

A sample contains m g of a compound X (Mx = molar mass). The sample contains n mol of x. Then n, m and M are related as

  1. M = m.n
  2. M = m/n
  3. M = n/m
  4. n = m.M

Answer

M = m/n

Explanation

The correct equation relating n, m, and M is:

m = n × M

This equation shows that the mass (m) of a compound X is equal to the product of the number of moles (n) and the molar mass (M) of the compound. Alternatively, we can rearrange the equation to get:

M = m/n

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