balloutbot balloutbot

15-01-2017
Chemistry

Answered

How many hydrogen atoms are in 105 g of water?

7.02 x 10^24 atoms

3.51 x 10^24 atoms

4.7 x 10^23 atoms

3.9 x 10^23 atoms

Verified Answer :

AbhiGhost AbhiGhost

15-01-2017

Moles of water atoms = mass/molecular weight = 105/18 = 5.83 mol. Number of moles of hydrogen in water = 2 x moles of water = 11.66. Number of H atoms in water = moles of hydrogen x 6.02 x 10^23 = 7.019 x 10^24 ~ 7.02 x 10^24 atoms. Hope this helps.

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