Question

How many moles in 12g of LiH?

Answer 1

Molar mass of LiH:-

`\\ \rm\longmapsto 7u+1u`

`\\ \rm\longmapsto 8g/mol`

Now

`\\ \rm\longmapsto No\:of\:moles=(Given\:Mass)/(Molar\:Mass)`

`\\ \rm\longmapsto No\:of\:moles=(12)/(8)`

`\\ \rm\longmapsto No\:of\;moles=1.5mol`