**Question**

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

**M = m.n****M = m/n****M = n/m****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