Question

which among the following has more number of molecules 1g of he and 1g of methane

Answer 1

First we have to find out the moles of each.

Moles of He=1/4

Moles of CH4=1/16

As we know 1mole contain avogdra number of molecules.

So molecules of He=1/4×6.022×10^23

And molecules of CH4 =1/16×6.022×10^23

Now we can see that molecules in 1g He will be more than the molecules in 1g CH4

Answer 2

YOUR ANSWER :

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We can solve the given question by using Avogadro's number- one mole of any substance contains 6.023 x 10²³ molecules / ions .

Calculating number of molecules :

Number of molecules = no. of moles x N

where no. of moles= given weight/gram molecular weight

N= Avogadro constant=6.023 x 10²³

number of molecules in 1g of H2=1/2 x 6.023 x 10²³

                                             =3.011 x 10²³ hydrogen molecules

Number of Molecules in 1g of methane=(1/16 )x 6.023 x 10²³

=0.376 x 10²³ methane molecules.

∴1 g of hydrogen contains more number of molecules than 1g of methane.

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