How many hydrogen adams are there in 3.14 moles of h2o

3.783×10²⁴

Explanation:

We know that one mole of water contain two moles of hydrogen atom and one mole of oxygen atom. shown in following equation:

                         2H₂ + O₂ → 2H₂O

And  

1 mole of hydrogen = 6.022×10²³ atoms of hydrogen

The number 6.022×10²³ is called Avogadro number and it is the number of atoms in one mole of substance. While we have to find the hydrogen atoms in 3.14 moles of water

So the factor 3.14 given in the question contain  

3.14×2×6.022×10²³ number of hydrogen atoms which is equal to the 3.783×10²⁴.

1.89×10^24 atoms

Explanation:

I mole of hydrogen molecule contains 6.02×10^23 atoms. This is known as the Avogadro's number. The Avogadro's number gives the number of elementary entities contained in one mole of a substance.

One mole of a substance is the amount of that substance that contains the same number of elementary entities as 12g of C-12

Hence 3.14 moles of hydrogen will contain 3.14 ×6.02×10^23= 1.89×10^24 atoms