Question

Hi guys please answer my question. ......

Gram atom of H in 5.5g of H2​

Answer 1

Answer:

hydrogen molar mass is 1g

given mass 5.5g

no. of moles= 5.5/1

=5.5moles

Answer 2

$Given \: mass \: of \: {H}_{2} \: = 5.5 g$

$Molar\: mass \: of \: {H}_{2} \: = 2 \dfrac{g}{mol}$

1 g of H atoms = no.of Avogadro's

For 5.5g gram of H2 ,

n = 5.5/1

n = 5.5g

Now, if we are asked to find no. of atoms in 5.5g of H2 then below explanation is correct.

Now we are required to calculate the number of moles in 5.5 g of Hydrogen Molecules.

No. of Moles = Given Mass/Molar Mass

n = 5.5/2

n = 2.75 mol

Again we are required to calculate the number of molecules in 2.75 mol.

No. of molecules = No. of moles × Avogadro's no

N = (2.75) × 6.023 × 10²³

N = 16.5 × 10²³

As we know that each molecule of Hydrogen Molecules contains 2 atoms of Hydrogen.

No. of atoms = 2(No. of Molecules)

N' = 2(16.5 × 10²³)

N' = 33 × 10²³ atoms of Hydrogen.

Hence,

No. of atoms in 5.5g of Hydrogen Molecules = N' = 33 × 19²³ atoms of Hydrogen.

However, exact numbers of atoms = N' = 33.11 × 10²³