Question

↪Hola users

↪please help me with this question

Answer 1

The greater the number of molecules, the more moles of a substance you have. 
number of moles=mass/molecular mass 

So for methane: 0.004/(12+(1*4))=2.5x10^-4 mols (mass is in kilograms) 
and for O2: 0.004/(2*16)=1.25x10^-4 

Which means that CH4 has the greater number of molecules.
Hope this will help you.

Answer 2

Answer:

I am study 12th (maths) .