Question

What is the mass in grams of 2.50 mol of ammonia vapor, NH3?

Answer 1

First find molar mass of NH_3

`\\ \tt\longmapsto NH_3`

`\\ \tt\longmapsto 14g/mol+3(1g/mol)`

`\\ \tt\longmapsto 14+3`

`\\ \tt\longmapsto 17g/mol`

• No of moles=2.5moles

`\\ \tt\longmapsto No\:of\;moles=(Given\:mass)/(Molar\;mass)`

`\\ \tt\longmapsto Given\:mass=No\:of\:moles* Molar\:mass`

`\\ \tt\longmapsto Given\:mass=2.5(17)`

`\\ \tt\longmapsto Given\:mass=42.5g`