Question

Which of following has more number of molecules:1g of hydrogen or 1g of methane

Answer 1

To calculate the number of molecules in these compounds you will use Avagadro's constant. First calculate the moles that will help you find the number of molecules using the Avagadro's constant. The detailed procedure for finding this number for comparison is as follows:

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Answer 2

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.