Question

a sample of 68 g NH3 was exposed to air at S.T.P 5.6 litre escaped out. how many moles of NH3 left.

Answer 1

Hello user

Moles of NH3 initially = 68/17 = 4

At STP, 5.6 litre escaped out ie, 0.25 moles

So, moles of NH3 left = 4-0.25

= 3.75 moles

Hope this helps

Answer 2

Answer:3.75 moles

Explanation:Refer to attachment please.