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QUESTION

# How many atoms are there in 1 mole of H2O, and how would you calculate this?

A mole refers to 6.022 x 10^23 items. H_2O has 2 hydrogen atoms and 1 oxygen atom...so a total of 3 atoms in each H_2O.

Therefore (6.022 x 10^23)x  (3 atoms) =18.066 x 10^23

Then we need to change the answer into proper : 18.066 x 10^23 = 1.8066 x 10^24

Lastly, change to proper number of . There are 4 significant figures in 6.022. Due to this we need to also have 4 significant figures in the final answer, so we would round 1.8066 x 10^24 to 1.807 x 10^24

So, your final answer is: 1.807 x 10^24