Question

In 0.32. gm. Of methane, the number of moles is

Answer 1

molar mass of methane= 12+4=16
therefore,
number of moles= mass given/molar mass
therefore,
0.32/16=0.2/1=2/10=0.2 moles.

Answer 2

it is very easy.
chemical formula of methane is CH4.
so we can say that its molecular mass is 12(one carbon)+4(four hydrogen)=16g
so, in 16gram of methane consist one mole.
so in .32 g= 1/16×.32=.02mole


hope you will understand