Question

number of molecules present in 10g of h2 is
with explanation.

Answer 1

Hey there !

Solution :

Molecular Mass of H₂ = 2 g

Given Mass = 10 g

Number of Moles = Given Mass / Molar Mass => 10 g / 2 g = 5 moles

Therefore Number of moles in 10 g of H₂ is 5 moles.

We know that in 1 mole there are 6.022 × 10²³ molecules.

So in 5 moles there would be : 5 × 6.022 × 10²³ Molecules

=> 30.11 × 10²³ Molecules of Hydrogen.

Hence 10 g of H₂ would contain 30.11 × 10²³ Molecules.

Hope my answer helped :-) 

Answer 2

Concept:

We may determine the number of particles in 1 mole (or mol) of material using Avogadro's number. These particles can be atoms, molecules, or electrons. Avogadro's number is equivalent to around 6.022140857 * 10²³ mol⁻¹.

Given:

Mass of H₂ = 10 g

Find:

Calculate the number of molecules present in 10g of H₂.

Solution:

1 mole of H₂ has 2 g of mass.

Thus 10 g of H₂ contain = 1/2 ×10 moles

1 mole contains 6.022 * 10²³ molecules.

Thus no. of molecules in 10 g of H₂ is 10/2 * 6.022 * 10²³ molecules = 30.11 * 10²³ molecules of H₂.

Hence, the number of molecules present in 10g of H₂ is 30.11 * 10²³ molecules.

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