Question

how many atom are in 5g hydrogen​

Answer 1

H has atomic weight of 1.008 and atomic weight represents 1 mole or 6.02× 10 ^23 atoms .

To find the answer one must divide 5 by 1.008 and multiply that by 6.02×10^23

then the answer = 2.986111111× 10^24 atoms

Answer 2

One mole of Hydrogen gas (H2) weighs 2g.

So,

in 5g hydrogen, there are 5/2 = 2.5 moles of Hydrogen.

In 1 mole of Hydrogen, there are 6.022×10^23 hydrogen molecules.

And, in 1 mole of Hydrogen, there are 2×6.022×10^23 hydrogen atoms.

So,

in 2.5 moles of hydrogen, there are 2.5×2×6.022×10^23 hydrogen atoms

= 30.11×10^23 hydrogen atoms.

So, there are 30.11×10^23 hydrogen atoms.

❣️Thnx dear.....!!❣️