Question

Please solve the above attachment...​

Answer 1

Answer:

I) No. of moles = given mass/molecular mass=no. of particles/ avagadro no.

no. of moles in He = 2/4

therefore moles in helium = 2 moles

ii). no. of moles= 1.6/16*2

O2= 20 moles..

iii) and iv). are also like this...

plzsss mark me a brainlist....