Question

Gram atom of hydrogen in 5.5g of water

Answer 1

Explanation:

What are the gram atoms of hydrogen in 5.5g of H2?

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Mass in grams of Hydrogen = 5.5 g

Molar mass of Hydrogen = 2 g/mol

First we calculate moles

No of moles = (mass in grams)/molar mass

No of moles = 5.5/2

No of moles = 2.75 mol

Then calculate no of molecules

No of molecules = (no of moles) x Avogadro's number

No of molecules = 2.75 x 6.02x10^23

No of molecules = 16.5x19^23

Then calculate no of atoms of Hydrogen

No of molecules = 16.5x19^23

And each molecule contains 2 atoms of Hydrogen

So

No of atoms of Hydrogen = (16.5x19^23) x 2

No of atoms of Hydrogen = 33.11x10^23